The purpose of this research is to develope a simplified method to predict the relationship between the design of architecture envelope and the air- conditioning load in Taiwan. Four types of buildings including Office, Hospital, Hotel and Commercial Buildings with 4 regression formulas were established. The R-square value lies between 0.86 and 0.91 which is convincible. The norm „Regulations of Building Energy Conservation Design in Taiwan“ also referenced the results of this research. According to the cooling load predicting model developed in the research, we also found some efficient ways to decrease the cooling load by changing the design of the building envelope.