saat remaja koo hye sun bercita-cita menjadi seorang penyanyi, ketika duduk di bangku sekolah menengah, dia mendirikan sebuah band dengan teman-teman sekolahnya, namun karena koo hye sun mendapatkan popularitas sebagai ulzzang (best face) di internet, dia menunda keinginannya tersebut.
koo hye sun kemudian bergabung dengan agensi yg entertainment dan berharap bisa menjadi penyanyi.
tetapi hyeon seok yang, ceo yg entertainment, menganjurkannya untuk meniti karier di bidang akting dibanding musik.
kemunculan pertamanya di layar televisi adalah di iklan sambo computer tahun 2002.
debut pertama di dunia akting dilakoni dalam serial televisi produksi kbs, drama city tahun 2004.
perannya sebagai hyejin dalam drama nonstop 5 produksi mbc 2005 mulai mencuri perhatian pemirsa televisi.
namanya semakin diperhitungkan setelah drama pure 19 (2006) yang dimainkannya sukses.
di drama itu selain didapuk menjadi pemeran utama, hye sun juga menyanyikan original soundtracknya.
di awal tahun 2009 perannya sebagai geum jandi di dalam serial fenomenal boys before flowers membuatnya namanya semakin terkenal hampir ke seluruh asia timur dan tenggara menyusul kesuksesan drama tersebut.
pada tahun 2009 ia juga mencoba mengembangkan bakatnya ke dalam bidang seni lain.
pada 1 april, 2009 koo hye sun menerbitkan novel yang berjudul tango.
novel tango, meledak di pasaran dan dalam seminggu telah terjual di atas 30.000 copy.
koo hye sun juga merambah dunia film sebagai sutradara untuk sebuah film pendek yang berjudul the cheerful caretaker (yukwaehan dowoomi), film ini berkisah sekitar topik tentang bunuh diri.
dalam film ini koo hye sun tak hanya sebagai sutradara, ia juga merangkap sebagai penulis cerita, editor, dan penggubah musik.
the cheerful caretaker di putar di busan asian short film festival 2009 dan berhasil menerima penghargaan audience award.
film ini juga masuk ke dalam pucheon international fantastic film festifal 2009.
koo hye sun membuka pameran lukisan pertama nya ( diilhami oleh lukisan dari novel tango) dari 1 - 7 july 2009 di galeri la mer insadong, seoul.
pemeran drama boys before flowers lainnya lee min ho dan kim joon menyempatkan diri datang dalam pembukaannya.
hye sun juga meluncurkan album pertama di bulan oktober 2009, album itu bertitel breath yang terdiri dari 8 lagu instrumental piano, kecuali lagu around the corner yang dinyanyikan penyanyi gummy
tahun drama peran tv
2015 blood yoo ri-ta kbs 2
2014 angel eyes yoon soo-wan sbs
2012 absolute boyfriend guan xiao fei gtv taiwan
take care of us, captain han da jin sbs
2011 the musical go eun bi sbs
2009 boys before flowers geum jan di kbs 2
2008 strongest chilwoo yoon so yoon kbs 2
2007 the king and i yoon so hwa sbs
2006 pure 19 yang guk hwa kbs 1
2005 ballad of suh dong eun jin sbs
2005 nonstop (season 5) herself mbc
2005 drama city (eps all together cha cha cha) yeong ae kbs 2
2004 drama city (eps anagram) nurse kbs 2
tv shows - variety
mbc blue night - radio show (2011)
kbs cool fm 89.1 mhz - radio show (2011)
design korea (2010)
the han love program (okaido, japan) (2010)
doosan bears baseball team - ceremonial first pitch (2010)
kbs "invincible saturday" (2010)
cine town radio show (2010)
kbs talk show winwin (2010)
tvn talk show "taxi" (2010)
farenheit fan meeting (2010) special guest
literature with a voice (2009)
discovery of recitation (2009)
lee hana peppermint show (2009)
doosan bears baseball team - ceremonial first pitch (2007)
mtv girls on top (2007)
yashimmanman - ep 174 (2006)
happy together friends - (2006)
x-man #46 - eps 102 & 103 (2005)
2015 happy together bintang tamu kbs2 season 3 ep. 385
august rush (cameo - 2007)
10th jecheon international music &
film festival (official trailer - 2014)
14th persons with disabilities film festival (official trailer - 2013)
white dog (samsung galaxy s4) (film pendek - 2013)
fragments of sweet memories (film pendek - 2012)choi, eun-hwa (12 march 2012).
"yoo seung ho cast in director gu hye sun's 3d film". enewsworld.suk, monica (12 march 2012).
"ku hye-sun casts yoo seung-ho in her next short film".
10asialee, tae-ho (30 july 2012).
"actress ku hye-sun to attend 8th jimff as director".
10asia.sunwoo, carla (31 july 2012).
"ku hye-sun to screen her 3-d short".
korea joongang daily.
peach tree (2011)
13th seoul international women's film festival (official trailer) (maret 2011)
you (film pendek - 2010)
7th asiana international short film festival (official trailer - 2009)
cheerfull caretaker (film pendek - 2009)
the making of magic (reference book, juni 2010)
tango (novel, april 2009)
the peach tree (2012)
happy birthday to you (nonstop 5 ost)
sarang ga (love story)(pure in heart ost)
brown hair (single) (2010)
breathe (album instrumental) (2009)
fly again (take care of us, captain ost)
marry me (2012)
flying galaxy (2013)
its you (2013)
model video klip
brown hair official mv (2010)
fahrenheit  touch your heart (2010)
kim ji eun  yesterday is different from today (2007)
soul star  will forget (2006)
im taebin  the reason i close my eyes (2004)
sung si kyeong  we quite match well (2002)
seo in guk - with laughter or with tears (2013)
beatburger - she so high (2014) model official mv with changmin tvxq
samsung galxy s4
danahan - ecopure hair color cream (2011)
toyota - toyota corolla (2011)
nikon - dslr camera (2011)
somang cosmetics (2011)
toyota prius (2010)
kisa - korea internet security agency (2010)
pantech - android smartphone "izar" (2010)
tous les jours (2010) (promoting the opening of the tlj gallery)
tous les jours (2010) (along with rain supporting south korea soccer team)
somang cosmetics (2010)
taiwan: touch your heart (taiwanese tourism campaign) (2010)
rg ii (2009)
tous les jours (2009)
doutor coffee (2009)
lg teen ring (2009)
cheoum cheoreom (2008)
tous les jours (2007/2008)
beauty credit (2007)
coenzym cream (2007)
sam-bo computer slim pc (2002) diakses 12 agustus 2010
big issue (october 2014 issue)
instyle korea (october 2014 issue)
styler (october 2014 issue)
sure (april 2014 issue)
f.ound (february 2014 issue)
elle korea (2013 issue)
mr (hong kong) (november 2013 issue)
instyle korea (2013 issue)
taiwan next magazine (june 2011 issue)
shin dong ah magazine (march 2011 issue)
the musical magazine (january 2011 issue)
bling magazine (december 2010 issue)
top class magazine (august 2010 issue)
sure magazine (july 2010 issue)
movieweek (june 2010 issue, inside article)
bazaar (june 2010 korean issue)
singles (june 2010 issue)
jiff daily magazine (may 2010 japanese issue)
hot chilli paper (japanese magazine) (may 2010 issue, not cover)
vogue girl (march 2010 issue) (photoshoot along with other models)
elle girl (august 2009 korean issue, inside interview, not cover)
e-daily (july 2009 issue)
vogue (july 2009 taiwanese issue)
cindy the perky (may 2007 issue)
dramatique (january 2007 issue)
cindy the perky (july 2006 issue)
cindy the perky (october 2005 issue)
ecole (july 2002 issue)
2014 sbs drama awards: best couple award bersama lee sang-yoon (nominasi untuk angel eyes)
2014 sbs drama awards: excellence award, actress in a drama special (nominasi untuk angel eyes)
2014 ministry of gender equality and family: grand prize in gender equality
2012 korea fulfillment: awards grand prize (daesang)
2012 sbs drama awards: top excellence award, actress in a drama special (nominasi untuk take care of us, captain)
2012 31st brussels international fantastic film festival: orbit competition (nominasi untuk the peach tree)
2011 5th mnet 20's choice awards: hot 20's voice (nominasi)
2010 tokyo intl' film festival: best asian-middle eastern film award (nominasi) (untuk magic)
2010 short shorts film festival: spotlight award (untuk the cheerful caretaker)
2009 kbs drama awards: novella drama excellence award - actress (boys before flowers)
2009 kbs drama awards: best couple award (bersama lee min ho dalam boys before flowers)
2009 kbs drama awards: netizen popularity award - actress (boys before flowers)
2009 6th yahoo!
asia buzz awards (taiwan): best asian female star
2009 andre kim best star awards: best female star
2009 14th asian television awards: nominated for best drama performance by an actress (boys before flowers)
2009 pusan asian short film festival: audience award untuk cheerful caretaker
2007 sbs drama awards: new star award (the king and i)
2006 kbs drama awards: new actress award (pure 19) situs web koreandrama.com diakses 10 april 2010
ku hye-sun at yg entertainment