Access controlling method for network application and device thereof

The invention discloses an access controlling method for network application and a device thereof. The method comprises the following steps: network equipment acquires a domain name of a DNS (Domain Name Server) of network application which a client requests to access according to a monitored DNS search message in a control interacting phase of network application access; or the network equipment acquires an internet protocol (IP) address of an application server according to a monitored interactive message between the client and the application server in a data interacting phase of the network application access, and acquires the domain name of the DNS corresponding to the IP address of the application server through reversely searching the DNS; the network equipment searches a corresponding access control policy from the corresponding relationship of the preset domain name of the DNS and the access control policy according to the domain name of the DNS; and the network equipment determines an access control rule according to the searched access control policy, and controls the message of the network application transmitted from the client correspondingly according to the access control rule. By adopting the method and the device, the accuracy of network application identification can be improved.