To provide a factory food production network system for attaining employment creation, sales guarantee, and reduction of a payment load on home acquisition loan by supplying a factory food production plant in combination use with a residence.

A factory food production network system includes a system contract step S1, a construction contract step S2, a construction contract step S3, a plant construction contract step S4, a maintenance management contract step S5, a seeding and young fish supply contract step S6, a production contract step S7, a delivery contract step S8, a shipping step S9, a sale contract step S10, and a settlement contract step S11. The factory food production network system is comprehensively and systematically managed by a factory food operation management company. The steps from S7-S10 are systematically managed by a matrix two-dimensional code management system. Thus, residence plant repayment loan guarantee is accepted, which is held between a factory food production plant to be the plant in combination use with the residence owned by an individual and a non-life insurance company.