The invention discloses a customer tracking service method and a customer tracking service system for a website. The system comprises a timing module, a tracking recording module, a foreground detection module, a central rule processing module, a page address comparison database, a result counting module, a data storage module, a demand matching module and a page pop-up assisting module. By the system and the method, some pieces of hot information and professional information are set and then directly transmitted to a user who needs the information, so time for searching data by the user is reduced; and by behavior analysis, the data which is wanted and needed most by the user is transmitted to the user, so efficiency is improved.