The invention discloses a WIFI-based precision ad pushing method. According to the method, through judging an access place, access time, personal information and preferences of a user using WIFI service, and ad interesting the user can be precisely pushed. The prior WIFI certification process and the mechanism, a mobile phone and other devices do not need any change, and precise WIFI ad pushing can be realized. Thus, a platform can build a client relationship database tied with WLAN user names, an ad can be customized for the user on the basis, the most proper ad can be sent to the user at the specific time and place, shortcomings and the problem or poor user experience and not obvious ad effects caused by the prior WIFI ad pushing mechanism can be fundamentally solved, and the practical needs for precise ad pushing by the current operator can be met.