In one embodiment, a motion recognition system includes a camera which can sense a signal indicating a position of a moving object and generate a monitoring information of the signal to a controller. The controller coupled to the camera can calculate a plurality of parameters (e.g., a velocity of the moving object, a motion vector of the moving object, and a flicker frequency of the signal) according to the monitoring information. The controller can generate motion data of the moving object according to the plurality of parameters and compare the motion data with at least one motion data reference according to a data matching algorithm, and generate a motion matching signal according to a result of the comparison. As such, a functional module coupled to the controller can receive the matching signal and perform at least one function according to the matching signal.