The invention discloses an energy efficiency optimization method for a wireless dense network. When the network is in a steady-state period, a user periodically sends accessible base station information to a gathering server via a macro base station link; according to the current available base station bandwidth Bavail, the signal strength Ps of the accessible base station and the load ratio Rload of the accessible base station, the gathering server determines the best transfer base station for the user; when the total number Nmove of to-be-transferred users in the base station is equal to the total number of users currently served by the base station, the best transfer base station ID information Imt for the to-be-transferred users in a user attribute table is sent to each user via the macro base station link; after the user receives the best transfer base station ID information, current connection is cut off, and the to-be-transferred base station Imt is related; and the user feeds the transfer information back to the gathering server, and the gathering server updates the user attribute table and a base station attribute table according to the transfer information. According to the above energy efficiency optimization method provided by the invention, on the premise of ensuring the user transmission performance, the network energy efficiency can be greatly improved.