2. The sorting method of claim 1 , wherein the sort algorithm is executed by using a simulation function, and the simulation function is one of a linear function and a nonlinear function.
3. The sorting method of claim 2 , wherein generating the sort algorithm, further comprising: generating the simulation function by setting the keyword ranking and the keyword category of each of the plurality of second keywords as a domain of the simulation function and setting the current ranking of each of the plurality of second data documents as a range of the simulation function.