Disclosed in the present invention are an e-SIM card-based operator selection method, device and mobile terminal, the method comprising: performing a current network signal detection for communication data of operators in a current environment of an acquired user, so as to obtain a current network signal detection result, wherein the operators are all in an operator list in a mobile terminal of the user, and the operator list includes at least two kinds of operators; acquiring current operation parameters of the mobile terminal; and selecting a corresponding operator in the operator list according to the current operation parameters and the current network signal detection result. Hence, the present method may be used to select an appropriate operator for the user according to actual needs, thereby making better use of public resources. In addition, also disclosed in the present invention are an e-SIM card-based device and mobile terminal for use in operator selection.