An image-capturing device includes a camera and a rotating mechanism for orienting the camera in multiple directions. The rotating mechanism includes a motor; a driving gear; a first transmission module including a first input gear, which is selectively engaged with and transmitted to rotate by the driving gear at a first position, and transmitting the camera to rotate in a first direction with rotation of the first input gear; a second transmission module including a second input gear, which is selectively engaged with and transmitted to rotate by the driving gear at a second position, and transmitting the camera to rotate in a second direction with rotation of the second input gear; and a clutch mechanism including a clutch device for driving the driving gear to switch between the first position and the second position. The clutch device includes a solenoid.