The present disclosure provides a SIM card management server, a binding device, a management method, a binding method and a binding system. By allocating a cloud SIM card and the network access information to an intelligent terminal of a user, so that the network access information of the original SIM card is replaced to acquire service from a carrier's network, and resource is conserved, the user is facilitated in flexibly replacing a cloud SIM card to access a network, and a system management of cloud SIM card is facilitated.