In order to obtain unified standard of all kinds of energy input into one family through energy consumption at the source end

achieve coupling of cold-hot-water-electricity-gas energy in the horizontal direction

and realize collaborative optimization of source-network-charge-storage in the vertical direction

this paper establishes the multi-energy flow model and directed graph of the directed green home in the future

by taking the energy-using device as the energy node. It builds up the time-sharing node mathematical model of the multi-energy flow

and then gives out the modeling process of the coupling matrix of the multi-energy flow equation. In this mode

the energy consumption situation of one day in summer is taken as an example to carry out optimization simulation. The results show that

this modeling method can be used to solve the optimization problem of energy flow in buildings with different structures of renewable energy

energy storage and recycling. Its optimization result indicates that the future green home based on the multi-energy flow system has the advantages in improving the living comfort and saving the operation cost.