The invention discloses a control method and a control system for turbine compressors operated in parallel. The system comprises a load balance control part, a performance control part and an anti-surge control part. The method comprises the steps that the surge control deviation is calculated, according to the surge control deviation of all the units in a compression station and the average surgecontrol deviation, automatic load distribution of the units is achieved, the performance control and the load balance control are adopted and combined to control the rotating speed of turbines and the main performance parameters of the units, and the coupling relation between the performance control and the anti-surge control is eliminated. According to the method and the system, through the combined coordination control, the load distribution of the compression station units operated in parallel is optimized, the safety operation of the units is better protected, and the operation efficiencyof the units is maximized.