The invention relates to a statistical method and system for page flow data and belongs to the technical field of computer networks. The method includes the steps that a unique identifier of a page is added into a page label; a browse log containing the unique identifier is received; the browser log is analyzed, and the flow data of the page is subjected to statistical processing according to the unique identifier. Accurate statistical processing of the page flow data based on the unique identifier can be achieved; the unique identifier serves as a primary key or index of a flow table, and rapid searching of the page flow data can be achieved.