The controls of west-east station keeping, longitude drifting control, north-south station keeping are the main tasks of the orbit control. From the engineering point of view, many practical formulas to calculate the objective and control parameters are presented here. They have been successfully used for a series control of the China FY-2B on-orbit satellite, which is required to move from 104.5°E to 123.5°E for evacuating the position for upcoming FY-2C satellite in Sept., 2004. During the control process, the longitude drift, north-south station keeping, attitude adjusting and spin speed control are made. Their perfect results show the correction of these practical formulas and strategies.