The present invention relates to a real estate subletting e-commerce system. Specifically, the present invention relates to a real estate subletting e-commerce system which registers a sublet article for sale by a sublessor or an agent terminal, and pays prepayment subletting money instead of the existing deposit for a contract of the registered subletting article for sale, thereby promoting stability and activation of a subletting contract.(A1, A2) Subletting article registration request signal(BB) Subletting consent internal information(C1, C2) Subletting consent(DD) Contract request signal(EE) Subletting agreement checking signal(FF) Subletting agreement checking request signalCOPYRIGHT KIPO 2017