The invention discloses a method of IM specific customer service call, as well as a server, a client and a system thereof. The method comprises the steps of: receiving login information sent by the client; obtaining the information of the customer service selected by a user in the login information; and utilizing the information of the customer service to establish the linking between the client and the customer service selected by the user. The server comprises a receiving module, an obtaining module and a linking module. The client comprises an adding module and a sending module. The systemcomprises the client and the server. In the embodiment, customer service options are added in virtue of the client at a user terminal, the information of the customer service selected by the user is transmitted to the server end when linking is established between the user and an enterprise customer service system, thus leading the server end to be capable of directly establishing the linking between the client and the customer service selected by the user according to the information of the customer service and consequently saving the expense of secondary communication. Therefore, the invention not only facilitates the fast linking of the user with the required customer service, but also reduces the communication pressure of the enterprise customer service system.