An optical transceiver, comprising: a first angle adjusting unit having a first reflection region and a second reflection region; an optical transmitter configured to transmit light to the first reflection region of the first angle adjusting unit; an optical receiver configured to receive light from the second reflection region of the first angle adjusting unit; a first light blocking member configured to separate a movement path of the transmitted light and a movement path of the received light; a second angle adjusting unit configured to move the first angle adjusting unit; and a controller configured to transmit a signal controlling an operation of the first angle adjusting unit to the first angle adjusting unit and transmit a signal controlling an operation of the second angle adjusting unit to the second angle adjusting unit, such that a scan available region may be determined according to a movement range of the first angle adjusting unit and a movement range of the second angle adjusting unit wherein the first angle adjusting unit includes a location sensor installed in a frame of the optical transceiver, characterized in that, the first angle adjusting unit includes a reflector having the first reflection region and the second reflection region, and a second gear connected to the reflector, wherein the location sensor transceives light with a location indicator attached to the reflector of the first angle adjusting unit and detects whether the reflector is located at a predetermined location in a state where the second gear of the first angle adjusting unit is rotated, wherein the location sensor includes a first location sensor and a second location sensor installed in a frame of the optical transceiver, the location indicator includes a first location indicator and a second location indicator installed in the reflector, wherein the first location sensor transceives light with the first location indicator, and detects whether the reflector is located at a predetermined first location in a state where the second gear of the first angle adjusting unit is rotated in a first direction, wherein the second location sensor transceives light with the second location indicator, and detects whether the reflector is located at a predetermined second location in a state where the second gear of the first angle adjusting unit is rotated in a second direction. a first angle adjusting unit having a first reflection region and a second reflection region; an optical transmitter configured to transmit light to the first reflection region of the first angle adjusting unit; an optical receiver configured to receive light from the second reflection region of the first angle adjusting unit; a first light blocking member configured to separate a movement path of the transmitted light and a movement path of the received light; a second angle adjusting unit configured to move the first angle adjusting unit; and a controller configured to transmit a signal controlling an operation of the first angle adjusting unit to the first angle adjusting unit and transmit a signal controlling an operation of the second angle adjusting unit to the second angle adjusting unit, such that a scan available region may be determined according to a movement range of the first angle adjusting unit and a movement range of the second angle adjusting unit wherein the first angle adjusting unit includes a location sensor installed in a frame of the optical transceiver, the first angle adjusting unit includes a reflector having the first reflection region and the second reflection region, and a second gear connected to the reflector, wherein the location sensor transceives light with a location indicator attached to the reflector of the first angle adjusting unit and detects whether the reflector is located at a predetermined location in a state where the second gear of the first angle adjusting unit is rotated, wherein the location sensor includes a first location sensor and a second location sensor installed in a frame of the optical transceiver, the location indicator includes a first location indicator and a second location indicator installed in the reflector, wherein the first location sensor transceives light with the first location indicator, and detects whether the reflector is located at a predetermined first location in a state where the second gear of the first angle adjusting unit is rotated in a first direction, wherein the second location sensor transceives light with the second location indicator, and detects whether the reflector is located at a predetermined second location in a state where the second gear of the first angle adjusting unit is rotated in a second direction.