The present invention discloses a sitting position detection apparatus and a control method thereof. The sitting position detection apparatus according to the present invention comprises: a left side inclination angle measuring unit measuring a left side inclination angle of a left side chair in a chair having the left side chair and a right side chair independently supporting left and right pelvis of a user, respectively a right side inclination angle measuring unit measuring a right side inclination angle of the right side chair an input unit setting operation start and an operation mode a storage unit storing the left side inclination angle and the right side inclination angle measured by the left side inclination angle measuring unit and the right side inclination angle measuring unit a control unit respectively receiving the left side inclination angle and the right side inclination angle from the left side inclination angle measurement unit and the right side inclination angle measurement unit according to the start of operation of the input unit, storing the received inclination angles in the storage unit, and analyzing and outputting the sitting position based on the left side inclination angle and the right side inclination angle stored in the storage unit according to the operation mode an interface unit outputting, to an external device, the left side inclination angle and the right side inclination angle measured by the left side inclination angle measurement unit and the right side inclination angle measurement unit and an output unit outputting an operation state of the control unit according to the operation mode. The present invention provides a user with posture correction information so that the user recognizes his/her wrong posture and consciously maintains a correct posture.본 발명은 앉은 자세 검출 장치 및 그 제어 방법이 개시된다. 본 발명의 앉은 자세 검출 장치는, 사용자의 좌우 골반을 각각 독립적으로 지지하는 좌측 좌대와 우측 좌대를 구비한 의자에서 좌측 좌대의 좌측 경사각을 측정하는 좌측 경사각 측정부 우측 좌대의 우측 경사각을 측정하는 우측 경사각 측정부 작동개시 및 작동
