The present invention provides a hand gesture recognition device, a hand gesture recognition method and a hand gesture recognition system. The hand gesture recognition device includes: at least one sensor corresponding to finger positions, wherein, the sensor is used to recognize the moving information of a moving finger relative to other fingers; an input mode judging unit, which judges the input mode required by the recognition device according to the hand posture moving information and angle change information detected by the at least one sensor, wherein, the input mode includes at least one of an analog keyboard input method, an analog function key, and an analog mouse; an input content generating unit, wherein, the input content generating unit generates corresponding one of the keyboard input position, functional key switching and mouse moving direction according to the hand gesture moving information and angle change information detected by the at least one sensor when the input mode judging unit confirms the required input mode. According to the invention, the virtual man-machine interaction can be realized and rapid and accurate analog input content is acquired.