A method of rendering parallel global illumination for obtaining a photo-realistic rendering image, includes: generating candidate parallel random numbers for creating a sample; creating a sample by selecting one of the generated random numbers; performing Monte Carlo integration on the basis of the created sample; and providing an application programming interface (API) common to operations having attributes of algorithm parallelism and data-level parallelism according to processed works, so that a common call interface calls a sample creating function, a random number generating function, and a Monte Carlo integration performing function. Furthermore, the method includes: demanding an operation regarding a processed work from a system call controller by the common call interface; performing parallel processing through a preset scheduling when the system call controller performs the operation demanded by the common call interface; and performing the processed work transferred from the system call controller by an operation hardware.