An ultrahigh-strength high-ductility steel sheet having excellent yield strength, comprising: carbon: 0.04 wt% to 0.18 wt%, silicon (Si): 2 wt% or less, manganese (Mn): 4 wt% to 10 wt%, phosphorous: more than 0% to 0.05 wt% or less, sulfur: more than 0% to 0.02 wt% or less, aluminum (Al): more than 0% to 0.5 wt% or less, nitrogen: more than 0% to 0.02 wt% or less, the steel sheet optionally further includes one or more among titanium (Ti): more than 0% to 0.1 wt% or less, niobium (Nb): more than 0% to 0.1 wt% or less-, vanadium: more than 0% to 0.2 wt% or less, and molybdenum (Mo): more than 0% to 0.5 wt% or less, the steel sheet optionally further includes one or more between zirconium (Zr): 0.001 wt% to 0.1 wt% and tungsten: 0.001 wt% to 0.5 wt%, the steel sheet optionally further includes one or more among nickel (Ni): more than 0% to 1 wt% or less, copper (Cu): more than 0% to 0.5 wt% or less, and chrome (Cr): more than 0% to 1 wt% or less, the steel sheet optionally further includes one or more among antimony (Sb): more than 0% to 0.1 wt% or less, calcium (Ca): more than 0% to 0.01 wt% or less, and boron: more than 0% to 0.01 wt% or less, and the balance is iron (Fe) and other inevitable impurities, wherein Si+Mn satisfies 6 wt% to 10 wt%, and a microstructure includes, by volume fraction, retained austenite of 12% or more and annealed martensite of 60% or more, wherein the balance, except for the retained austenite and the annealed martensite, of the microstructure of the steel sheet is formed of other inevitable phases including alpha martensite and epsilon martensite, and a volume fraction of the other inevitable phases is 20% or less, wherein the steel sheet has tensile strength of 980 MPa or more, a yield ratio of 0.75 or more, and the product of the tensile strength and the elongation of 23,000 MPa% or more, wherein the steel sheet has a wave height value, indicating shape properties, of 5 mm or less, wherein the wave height value represents a maximum H value in a rolling direction of the steel sheet per 1000 mm. carbon: 0.04 wt% to 0.18 wt%, silicon (Si): 2 wt% or less, manganese (Mn): 4 wt% to 10 wt%, phosphorous: more than 0% to 0.05 wt% or less, sulfur: more than 0% to 0.02 wt% or less, aluminum (Al): more than 0% to 0.5 wt% or less, nitrogen: more than 0% to 0.02 wt% or less, the steel sheet optionally further includes one or more among titanium (Ti): more than 0% to 0.1 wt% or less, niobium (Nb): more than 0% to 0.1 wt% or less-, vanadium: more than 0% to 0.2 wt% or less, and molybdenum (Mo): more than 0% to 0.5 wt% or less, the steel sheet optionally further includes one or more between zirconium (Zr): 0.001 wt% to 0.1 wt% and tungsten: 0.001 wt% to 0.5 wt%, the steel sheet optionally further includes one or more among nickel (Ni): more than 0% to 1 wt% or less, copper (Cu): more than 0% to 0.5 wt% or less, and chrome (Cr): more than 0% to 1 wt% or less, the steel sheet optionally further includes one or more among antimony (Sb): more than 0% to 0.1 wt% or less, calcium (Ca): more than 0% to 0.01 wt% or less, and boron: more than 0% to 0.01 wt% or less, and the balance is iron (Fe) and other inevitable impurities, wherein Si+Mn satisfies 6 wt% to 10 wt%, and a microstructure includes, by volume fraction, retained austenite of 12% or more and annealed martensite of 60% or more, wherein the balance, except for the retained austenite and the annealed martensite, of the microstructure of the steel sheet is formed of other inevitable phases including alpha martensite and epsilon martensite, and a volume fraction of the other inevitable phases is 20% or less, wherein the steel sheet has tensile strength of 980 MPa or more, a yield ratio of 0.75 or more, and the product of the tensile strength and the elongation of 23,000 MPa% or more, wherein the steel sheet has a wave height value, indicating shape properties, of 5 mm or less, wherein the wave height value represents a maximum H value in a rolling direction of the steel sheet per 1000 mm. 0.001 wt% to 0.1 wt% and tungsten: 0.001 wt% to 0.5 wt%, the steel sheet optionally further includes one or more among nickel (Ni): more than 0% to 1 wt% or less, copper (Cu): more than 0% to 0.5 wt% or less, and chrome (Cr): more than 0% to 1 wt% or less, the steel sheet optionally further includes one or more among antimony (Sb): more than 0% to 0.1 wt% or less, calcium (Ca): more than 0% to 0.01 wt% or less, and boron: more than 0% to 0.01 wt% or less, and the balance is iron (Fe) and other inevitable impurities, wherein Si+Mn satisfies 6 wt% to 10 wt%, and a microstructure includes, by volume fraction, retained austenite of 12% or more and annealed martensite of 60% or more, wherein the balance, except for the retained austenite and the annealed martensite, of the microstructure of the steel sheet is formed of other inevitable phases including alpha martensite and epsilon martensite, and a volume fraction of the other inevitable phases is 20% or less, wherein the steel sheet has tensile strength of 980 MPa or more, a yield ratio of 0.75 or more, and the product of the tensile strength and the elongation of 23,000 MPa% or more, wherein the steel sheet has a wave height value, indicating shape properties, of 5 mm or less, wherein the wave height value represents a maximum H value in a rolling direction of the steel sheet per 1000 mm.