According to the nature of geography and math, methods, this paper deals with the following five problems, which exist in quantitative study on geography during recent years.1 ) Lack of analising seriously the nature of the studied problems.2) Incorrectly choosing variables or demarcation unreasonable.3) Lack of abstract on problems and the chosen math, methods not fully suitable for them.4) Because of the lack of strict inference to the methods used, it is not easy to get reasonable conclusion.5 ) The methods used for this aim have no function to make problems more brief and easier.