The invention provides a rapid prototyping device and method thereof. The rapid prototyping device comprises an environmental temperature sensor, a control module, a nozzle, and a heating device. The rapid prototyping method comprises following steps of: sensing an environmental temperature, acquiring a nozzle heating temperature according to the environmental temperature; and heating a nozzle till reaching the nozzle heating temperature. After the preparation of the rapid prototyping device, the environmental temperature sensor senses an environmental temperature, then the control module acquires a nozzle heating temperature based on the environmental temperature, and then the control module controls the heating device for heating the nozzle to the nozzle heating temperature. By the temperature compensating function of the present invention, the quality of the heating material ejected by the nozzle can be maintained.