A three-dimensional reconstruction system (1, 2) comprising: a first sensor (10, 20, 30, 40) that is arranged at a predetermined position and generates first three-dimensional information (D10, D20, D30, D40) representing a target object by detecting the target object that is moving; a second sensor that is provided to be movable and generates second three-dimensional information representing an attention part of the target object by detecting the attention part; a three-dimensional information acquisition unit that acquires the first three-dimensional information (D10, D20, D30, D40) and the second three-dimensional information; a sensor information acquisition unit that acquires first sensor information (I10, I20, I30,I40) indicating a property intrinsic to the first sensor (10, 20, 30, 40) and second sensor information indicating a property intrinsic to the second sensor; a position posture information acquisition unit that acquires first position posture information (E10, E20, E30, E40) indicating a position and posture of the first sensor (10, 20, 30, 40) and acquires second position posture information indicating a position and posture of the second sensor; a three-dimensional reconstruction unit that reconstructs the three-dimensional information representing the attention part from the first three-dimensional information (D10, D20, D30, D40) and the second three-dimensional information by using the first sensor information (I10, I20, I30,I40), the second sensor information, the first position posture information (E10, E20, E30, E40) and the second position posture information; and a movement apparatus (200, 300) that changes the position and the posture of the second sensor, characterized in that the movement apparatus (200, 300) has an automatic tracking function to control the position and the posture of the second sensor based on the second three-dimensional information so that the attention part does not deviate from a detection range of the second sensor and so that the second sensor keeps on detecting the attention part. a first sensor (10, 20, 30, 40) that is arranged at a predetermined position and generates first three-dimensional information (D10, D20, D30, D40) representing a target object by detecting the target object that is moving; a second sensor that is provided to be movable and generates second three-dimensional information representing an attention part of the target object by detecting the attention part; a three-dimensional information acquisition unit that acquires the first three-dimensional information (D10, D20, D30, D40) and the second three-dimensional information; a sensor information acquisition unit that acquires first sensor information (I10, I20, I30,I40) indicating a property intrinsic to the first sensor (10, 20, 30, 40) and second sensor information indicating a property intrinsic to the second sensor; a position posture information acquisition unit that acquires first position posture information (E10, E20, E30, E40) indicating a position and posture of the first sensor (10, 20, 30, 40) and acquires second position posture information indicating a position and posture of the second sensor; a three-dimensional reconstruction unit that reconstructs the three-dimensional information representing the attention part from the first three-dimensional information (D10, D20, D30, D40) and the second three-dimensional information by using the first sensor information (I10, I20, I30,I40), the second sensor information, the first position posture information (E10, E20, E30, E40) and the second position posture information; and a movement apparatus (200, 300) that changes the position and the posture of the second sensor, characterized in that the movement apparatus (200, 300) has an automatic tracking function to control the position and the posture of the second sensor based on the second three-dimensional information so that the attention part does not deviate from a detection range of the second sensor and so that the second sensor keeps on detecting the attention part.