The invention relates to the field of databases, in particular to a cloud database establishment method. The method comprises the following steps of: recording daily sales, order quantities, daily customer groups and stocks of a plurality of products of a single electronic merchant, and storing the information in a cloud database; analyzing a region, a monthly purchase quantity and a monthly purchase amount of each customer in a monthly customer group, and summarizing monthly purchase quantities and monthly purchase amounts of the regions of the products; and summarizing daily sales, order quantities, daily customer groups and stocks of a plurality of products of multiple electronic merchants, storing the information in the cloud database, and obtaining fast-selling commodities and short-supply stock commodities of the regions through a data analysis module. Compared with the prior art, the method has the beneficial effects that the method can be used for guiding the merchants to sell commodities, perform advertisement release and adjust stocks; and the method also can guide producers to produce corresponding products, thereby preventing excess or insufficient production capacity.