The invention relates to a unified access method for mobile cellular network and radio local area network, comprising: step 1, setting a radio local area network authentication, authorization, charging server which is connected with a WAP gateway, a wireless controller respectively; step 2, a mobile terminal does a WAP registration to the radio local area network authentication, authorization, charging server; step 3, a radio local area network authentication of the mobile terminal is authenticated by the radio local area network authentication, authorization, charging server. The invention needs not rebuild PDSN (package data service node) of the CDMA1X network or SGSN/GGSN, WAP gateways of the GSM/GPRS network, keeps the package data service flow of the original mobile cellular network basically, does not change existing CDMA1X, CDMA1X service flow and net element functions, has high safety, centralized service flow, which is convenient to manage.