In order to analysis the climate resource and agricultural climatic region , each spot has its corresponding climate value in the grid map of 3″×3″ resolution . The meteorological data of 19 meteorological stations during last 30 years (1971—2000) of Tai′an city were used. Under the geographic information system CityStar40 platform supporting, the method of two trends-surface of three-dimension analysis and combining with inserting value of space were adopted. The grid maps of resolution 3″×3″ of Tai′an were produced. The result showed that, each target through the examination, the correlation coefficient are all above 0.960, the examining value of F are greater than F_0.05, average absolute errors of the annual mean temperature, the coldest monthly average temperature and the hottest monthly average temperature are less than 0.5℃, relative error of the accumulated temperature of ≥0℃, ≥5℃, ≥10℃ and ≥15℃ are under 5%