The importance of the micro-wave communication becomes more obvious withthe improvement of the world. Signals are translate by the micro-waveincluding TV, Broadcast and Mobilephone et cetera. The micro-wave antenna tower is the base of the micro-wave communication. The micro-wave will beinterrupted because of the higher and higher buildings in the city. We need to build higher tower in order to rise the quality of the micro-wave communication. The behaviors of steel tower used for micro-wave is similar to the cantilever beam. It has obvious response by lateral loading. So the main load of the tower is wind and earthquake. Every year on the average, there were three typhoons visited Taiwan. So the effect of the wind is more than the earthquake. The main purpose of this thesis is to calculate the forces which cause by the along-wind and analyzes the stability of the whole structure. Finally, we check the stress ratio of each members by AISC(ASD) manual.