A method for accelerating AEC (Automatic Exposure Control) convergence, comprising: acquiring a first AEC value of a first camera module in an automatic-exposure convergent state under a current scene; sharing the first AEC value under the current scene with a second camera module ; and operating the second camera module to start converging from the first AEC value in response to turning on the second camera module under the same current scene under which the first AEC value of the first camera module is acquired, and acquiring a second AEC value of the second camera module in the automatic-exposure convergent state; wherein the second camera module is turned on in response to at least one selected from the group consisting of: a triggering operation for switching a zoom factor; and a state of the first camera module being in the automatic-exposure convergent state; characterized by further comprising: acquiring a first turn-on time point of the first camera module and a second turn-on time point of the second camera module ; and determining that the second camera module is at the same scene with the first camera module in response to a time interval between the second turn-on time point and the first turn-on time point being within a preset time interval. acquiring a first AEC value of a first camera module in an automatic-exposure convergent state under a current scene; sharing the first AEC value under the current scene with a second camera module ; and operating the second camera module to start converging from the first AEC value in response to turning on the second camera module under the same current scene under which the first AEC value of the first camera module is acquired, and acquiring a second AEC value of the second camera module in the automatic-exposure convergent state; wherein the second camera module is turned on in response to at least one selected from the group consisting of: a triggering operation for switching a zoom factor; and a state of the first camera module being in the automatic-exposure convergent state; characterized by further comprising: acquiring a first turn-on time point of the first camera module and a second turn-on time point of the second camera module ; and determining that the second camera module is at the same scene with the first camera module in response to a time interval between the second turn-on time point and the first turn-on time point being within a preset time interval. a triggering operation for switching a zoom factor; and a state of the first camera module being in the automatic-exposure convergent state; characterized by further comprising: acquiring a first turn-on time point of the first camera module and a second turn-on time point of the second camera module ; and determining that the second camera module is at the same scene with the first camera module in response to a time interval between the second turn-on time point and the first turn-on time point being within a preset time interval. acquiring a first turn-on time point of the first camera module and a second turn-on time point of the second camera module ; and determining that the second camera module is at the same scene with the first camera module in response to a time interval between the second turn-on time point and the first turn-on time point being within a preset time interval. <EOS>