The invention discloses a transfer warehouse site selection method and system. The method comprises the steps of: acquiring preset business volume of finished automobiles of each city; according to the preset business volume of the finished automobiles of each city, acquiring a list of city coordinates meeting a preset acquisition condition; using the business volume of the finished automobiles corresponding to each city coordinate in the list of city coordinates as a weight, and respectively performing weighting on each city coordinate in the list of city coordinates to obtain a new list of city coordinates; performing cluster analysis on each city coordinate in the new list of city coordinates, and testing cluster distribution under the condition of a preset number of clusters; according to the tested cluster distribution under the condition of the preset number of clusters, obtaining the cluster distribution meeting a preset screening condition through screening; and performing transfer warehouse site selection according to the cluster distribution meeting the preset screening condition which is obtained through screening. According to the method and system provided by the invention, influence of city volume of business is considered, a transfer warehouse is established according to the screened cluster distribution meeting requirements, materials can be delivered timely and effectively, and thus, the method and system provided by the invention are of great significance to network planning, network optimization and like.