The invention discloses a nuclear power plant containment shell heat guiding out system which comprises a water source, a heat guiding out pump, and a cooling water outlet pipeline, wherein the heat guiding out pump is connected with the water source by virtue of a water inlet pipeline; the cooling water outlet pipeline is connected to the downstream of the heat guiding out pump; the water source is a water source in a containment shell system; the heat guiding out system also comprises a passive heat exhaust system connected between the heat guiding out pump and the cooling water outlet pipeline; the passive heat exhaust system is used for cooling hot water conveyed by the heat guiding out pump; and moreover, guided-out heat is utilized to generate power, and power is supplied to active equipment in the containment shell heat guiding out system. Compared with the prior art, the nuclear power plant containment shell heat guiding out system disclosed by the invention has the advantages that the water source in the containment shell system serves as the water source, and the containment shell heat is guided out and converted into the power in the active equipment by utilizing the passive heat exhaust system. Therefore, the dependence problem of the conventional heat guiding out system on an external cold source and an external power supply is solved.