A plural-component pump system using an oil jacket is provided to check the amount of paints of principal agent and hardening agent press tanks all the time by generating a warning sound if the amount of paints is reduced, by using a sensor unit. The plural-component pump system using an oil jacket is composed of a principal agent press tank(120) equipped with a principal agent supply pump(110) to supply paints and formed of the oil jacket at the outside; a hardening agent press tank(120-1) equipped with a hardening agent supply pump(110-1) to supply paints and formed of the oil jacket at the outside; a main pump(130) receiving and mixing a principal agent and a hardening agent discharged from the principal agent and hardening agent press tanks into one paint; a sprayer(140) discharging the paint mixed by the main pump to the outside; and a control unit(150) keeping the paint at proper temperature by applying electricity to the oil jackets formed at each outside of the principal agent and hardening agent press tanks and generating a warning sound if the amount of the paint is below a reference value.
