A data diffusion processing technique includes the steps of a) dividing a zone into a number of positions and giving a respective default value to each of the positions; and b) assigning one of the positions to be the triggering position and then using the assigned triggering position as the initial position to diffusely transfer data from the triggering position to at least one target position in a diffusion direction, for enabling each of the at least one target position to receive the diffusion data from the triggering position and then to diffusely transfer the diffusion data to at least one next target position after a relation operation of the default value the respective target position with the triggering value of the triggering position to convert the default value of the respective target position into a finished value.