A data access method and system

The invention is applicable to the field of communication technology and provides a data access method and a system. The data access method comprises the following steps: an external network server receives a user request sent by a mobile terminal, the user request being triggered by a preset application interface of the user at the mobile terminal; the external network server distributes the userrequest to the access server with the lowest load through the load balancing device; the external network server is connected with a plurality of the access servers through the load balancing device;the access server establishes a communication connection with the intranet server, and sends the user request to the intranet server; the intranet server receives and responds to the user request andreturns feedback information. The invention triggers the user request through the mobile terminal, realizes the access to the internal network through the external network server, reduces the condition of limited use, and impr