System and method for controlling compressor of cold-start vehicle

A system for controlling a compressor of a cold-start vehicle, the system comprising:

• an engine control unit (ECU) that controls a fuel injection amount corresponding to an engine load and an opening amount of a throttle according to a required torque required for an air conditioner (A/C);
• an operation information detector for detecting operation information according to driving state of the cold-start vehicle;
• a compressor that generates pressure through operation of a piston in a cylinder utilizing power of an engine during operation of the air conditioner;
• an air conditioner relay which is turned on when the air conditioner operates and is turned off when the air conditioner is stopped in a response to an operation signal of the ECU;
• and
• a controller which is connected to the ECU and determines an intake manifold negative pressure stored in a brake booster by subtracting an intake manifold pressure from atmospheric pressure detected by the operation information detector, and when a cooling water temperature is lower than a predetermined temperature and the intake manifold negative pressure is lower than a first threshold value during operation of the air conditioner, a cold-start intake manifold negative pressure insufficient event is generated to reduce an A/C duty of the compressor in accordance with an entry into a negative pressure recovery mode.