To study the building anthropogenic heat emission law and outdoor atmospheric dynamic thermal balance in urban complex which has multiple functions, an urban complex thermal climate dynamic prediction model is developed and applied to an actual planning project in Shenzhen. The results show that the heat release from building happens in most of the time of a typical calculation day, and the heat release law follows the operation law of the corresponding type of air conditioning refrigeration system. During the whole calculation period, the building anthropogenic heat accounts for the largest proportion of the total heat released, which is about 62.1％. The heat island intensity daily average value and maximum value in the whole calculating period of the urban complex area is 0.1-0.45 ℃ lager than that of the common urban area with a single building type. The above results suggest that the anthropogenic heat discharge from building is one of the main factors for the formation of hot and wet climate in this urban complex area.