The application discloses a plug-in operation method used for overcoming the problem of unstable system operation caused by the plug-in operation mode in the prior art. The method comprises the steps of obtaining the stabilization level of the plug-in to be operated; determining a plug-in operation mode corresponding to the obtained stabilization level according to the corresponding relation between a stored stabilization level and the plug-in operation mode; and operating the plug-in to be operated according to the determined plug-in operation mode. The application also discloses a client terminal and a system of the plug-in operation.