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 for a frame according to the generated rendering processing command by a rendering manager, and storing the generated rendering image in a memory. A task for generating a rendering processing command is divided into at least one task, a task for generating a rendering image is divided into at least one task, and the divided tasks can be processed simultaneously in a plurality of threads.