Control system of hybrid vehicle and method thereof

A control system of a hybrid vehicle, comprising:

• an engine that generates power by burning fuel;
• a driving motor that assists the power from the engine by generating power using electricity supplied from a battery;
• an integrated starter-generator that starts the engine and charges the battery by operating selectively as a power generator;
• an atmospheric sensor that measures atmospheric pressure;
• a temperature sensor that measures a temperature of intake air flowing into the engine;
• and
• a controller that calculates a control factor, using the atmospheric pressure measured by the atmospheric sensor and the temperature of intake air measured by the temperature sensor, and adjusts a State of Charge (SOC) charge band between an SOC where charging the battery is started and an SOC where a hybrid vehicle runs in a charge mode, in accordance with a magnitude of the control factor,
• wherein the control factor is calculated by multiplying the atmospheric pressure by a pressure weight value and multiplying the temperature of the intake air by a temperature weight value.