The present invention discloses a hand function rehabilitation robot for patients with stroke and a use method of the hand function rehabilitation robot. The rehabilitation robot comprises a refrigeration and heating module, a motion training module, a water tank, a sensor unit and a control box, the refrigeration and heating module consists of a heat-conducting glove, a refrigeration sheet fixingfilm, semiconductor refrigeration sheets, a refrigerator, a flexible water pipe and a protective outer sleeve, and the motion training module comprises an adjusting slide block, a fixing bandage anda shape memory alloy sheet; and the sensor unit comprises a temperature sensor subunit, an inclination angle sensor subunit, a fingertip pressure sensor subunit, a muscle tension detection subunit anda myoelectricity detection subunit. Spasticity of a patient is evaluated to give out training parameters through multi-sensor information fusion. The robot has advantages of accurate control, compactstructure, etc., can realize cold and heat therapy and exercise training at the same time, improves rehabilitation efficiency, and can solve problems of huge system, inconvenient use, slow temperature response, etc. of traditional temperature stimulation therapy based on hydrotherapy.