Provided are a state-owned and publicly owned land lease system and a land lease management method. In the present invention, the state-owned and publicly owned land lease system includes a web server which provides clients who access a network with a web page to inquire on or input land lease related information; and a relay server which is connected to the web server through a firewall, is connected to the internal payment system of a finance institution through the internal network of the finance institution which manages the land lease, delivers land lease information received from the web server to the internal payment system, processes the payment approval when the payment approval information is received from the internal payment system, and offers the processing results to the web server.[Reference numerals] (5) House rent; (6) Rent; (7) Repay a loan; (8) Return a house (Trust contract cancellation); (AA) Truster (Local governments); (BB) Land trust; (CC) Beneficial interests certificate; (DD) Trustee (Financial institutions); (EE) Completion and lease management; (FF) Lend business expenses; (GG) Lender group; (HH) LesseeCOPYRIGHT KIPO 2014