A method performed by a virtual subscriber identity module management server for implementing a virtual subscriber identity module of a terminal, comprising: receiving a virtual subscriber identity module, VSIM, application request sent by the terminal, wherein the VSIM application request carries an identifier of a VSIM desired by a user of the terminal; obtaining corresponding VSIM installation information according to the identifier of the desired VSIM; and sending the VSIM installation information to the terminal, to enable the terminal to install the VSIM according to the VSIM installation information; after the sending the VSIM installation information to the terminal, to enable the terminal to install the VSIM according to the VSIM installation information, the method further comprises: receiving first activation information sent by the terminal, wherein the first activation information carries an activation code and the identifier of the VSIM; verifying whether the activation code is correct; characterized by if the activation code is correct, sending second activation information carrying the identifier of the VSIM to a network side network element, or, obtaining the identifier of the network side network element corresponding to the identifier of the VSIM according to a mapping relationship between the identifier of the VSIM and an identifier of the network side network element, and sending the second activation information carrying the identifier of the VSIM to the network side network element corresponding to the identifier of the network side network element, to enable the network side network element to return, according to the identifier of the VSIM, first response information carrying the identifier of the VSIM; and receiving the first response information, and sending second response information to the terminal according to the identifier of the VSIM, so as to activate the VSIM installed by the terminal. receiving a virtual subscriber identity module, VSIM, application request sent by the terminal, wherein the VSIM application request carries an identifier of a VSIM desired by a user of the terminal; obtaining corresponding VSIM installation information according to the identifier of the desired VSIM; and sending the VSIM installation information to the terminal, to enable the terminal to install the VSIM according to the VSIM installation information; after the sending the VSIM installation information to the terminal, to enable the terminal to install the VSIM according to the VSIM installation information, the method further comprises: receiving first activation information sent by the terminal, wherein the first activation information carries an activation code and the identifier of the VSIM; verifying whether the activation code is correct; characterized by if the activation code is correct, sending second activation information carrying the identifier of the VSIM to a network side network element, or, obtaining the identifier of the network side network element corresponding to the identifier of the VSIM according to a mapping relationship between the identifier of the VSIM and an identifier of the network side network element, and sending the second activation information carrying the identifier of the VSIM to the network side network element corresponding to the identifier of the network side network element, to enable the network side network element to return, according to the identifier of the VSIM, first response information carrying the identifier of the VSIM; and receiving the first response information, and sending second response information to the terminal according to the identifier of the VSIM, so as to activate the VSIM installed by the terminal. receiving first activation information sent by the terminal, wherein the first activation information carries an activation code and the identifier of the VSIM; verifying whether the activation code is correct; characterized by if the activation code is correct, sending second activation information carrying the identifier of the VSIM to a network side network element, or, obtaining the identifier of the network side network element corresponding to the identifier of the VSIM according to a mapping relationship between the identifier of the VSIM and an identifier of the network side network element, and sending the second activation information carrying the identifier of the VSIM to the network side network element corresponding to the identifier of the network side network element, to enable the network side network element to return, according to the identifier of the VSIM, first response information carrying the identifier of the VSIM; and receiving the first response information, and sending second response information to the terminal according to the identifier of the VSIM, so as to activate the VSIM installed by the terminal.