A rendering processing apparatus and method using multiprocessing are disclosed. The rendering processing method includes dividing an application execution window into frames and generating a rendering processing command for rendering processing of an image on a frame basis by a pre-rendering manager, generating a rendering image on a frame basis according to the rendering processing command by a rendering manager, and storing the generated rendering image in a memory. The generation of a rendering processing command and the generation of a rendering image are performed in a plurality of threads.