A lift control method comprises the following steps: (1) detecting the load of a lift, (2) judging whether the load of the lift is within a rated load range, alarming the returning to the step (1) if the load of the lift is larger than the largest value of the rated load range, accepting the processing staying request signals in the lift, neglecting all the staying request signals outside the lift, and controlling the lift to stay corresponding to the staying request signals in the lift if the load of the lift is within the rated load range, accepting and processing the staying request signals outside the lift and the staying request signals in the lift, and controlling the lift to stay on floors according to the staying request signals outside the lift or the staying request signals in the lift if the load of the lift is smaller than the smallest value of the rated load range. The invention further discloses a lift control system using the lift control method. According to the method and system, an original method and system are improved, so that the lift can be controlled more reasonably, and the working efficiency of the lift can be effectively improved.