System of recycling exhaust heat from internal combustion engine

A system of recycling exhaust heat from an internal combustion engine may include a working fluid circulating line configured to rotate a turbine with a working fluid vaporized by heat received from an EGR line of the internal combustion engine, an EGR side heat exchanging unit configured to perform a heat exchange between an EGR gas and the working fluid to thereby cool the EGR gas and transfer heat from the EGR gas to the working fluid, and a gas-liquid separator configured to be formed between the EGR side heat exchanging unit and the turbine to thereby supply only a gas component of the working fluid to the turbine.