A load control method for a wireless communication system, said wireless communication system comprising at least one base station and a plurality of services in a cell that is serviced by the base station, said method comprising: determining if the cell load is in a state that needs to be adjusted; selecting a candidate service to be adjusted from the plurality of services in the cell; and adjusting the service selected in said selecting step and thereby adjusting the cell load if the determination result in said determining step is to adjust the state; wherein said selecting step comprises: calculating the service QoS weighted value of each service according to the rate and signal to noise ratio of said service, or calculating the service QoS weighted value of each service according to the change amount of the signal to noise ratio and said service rate; wherein said plurality of services have different types, and each service type is predefined with a service time delay level, said selecting step further comprising: calculating the load control priority of each service respectively according to said calculated service QoS weighted value and said service time delay level corresponded to said service by using the following formula: PRI = S QoS × T wherein PRI is the load control priority, S QoS is the service QoS weighted value, and T is the value of the service time delay level; and selecting the candidate service to be adjusted according to said calculated load control priority. determining if the cell load is in a state that needs to be adjusted; selecting a candidate service to be adjusted from the plurality of services in the cell; and adjusting the service selected in said selecting step and thereby adjusting the cell load if the determination result in said determining step is to adjust the state; wherein said selecting step comprises: calculating the service QoS weighted value of each service according to the rate and signal to noise ratio of said service, or calculating the service QoS weighted value of each service according to the change amount of the signal to noise ratio and said service rate; wherein said plurality of services have different types, and each service type is predefined with a service time delay level, said selecting step further comprising: calculating the load control priority of each service respectively according to said calculated service QoS weighted value and said service time delay level corresponded to said service by using the following formula: PRI = S QoS × T wherein PRI is the load control priority, S QoS is the service QoS weighted value, and T is the value of the service time delay level; and selecting the candidate service to be adjusted according to said calculated load control priority. calculating the service QoS weighted value of each service according to the rate and signal to noise ratio of said service, or calculating the service QoS weighted value of each service according to the change amount of the signal to noise ratio and said service rate; wherein said plurality of services have different types, and each service type is predefined with a service time delay level, said selecting step further comprising: calculating the load control priority of each service respectively according to said calculated service QoS weighted value and said service time delay level corresponded to said service by using the following formula: PRI = S QoS × T wherein PRI is the load control priority, S QoS is the service QoS weighted value, and T is the value of the service time delay level; and selecting the candidate service to be adjusted according to said calculated load control priority. calculating the load control priority of each service respectively according to said calculated service QoS weighted value and said service time delay level corresponded to said service by using the following formula: PRI = S QoS × T wherein PRI is the load control priority, S QoS is the service QoS weighted value, and T is the value of the service time delay level; and selecting the candidate service to be adjusted according to said calculated load control priority. wherein PRI is the load control priority, S QoS is the service QoS weighted value, and T is the value of the service time delay level; and selecting the candidate service to be adjusted according to said calculated load control priority.