We were able to express the order parameter of the spin glass model in the ground state using simultaneous equations. Although this simultaneous equation is an equation that is valid only in the ground state, it is possible to minimize economic loss from a network system that influences each other to model food chains, organizations, economic social phenomena, etc., and to obtain optimal results from complex conditions. Accurately understanding the ground state provides a wide range of benefits, including combinatorial optimization problems that enable accurate matching. Furthermore, since the spin glass ising model is a basic model, it is also possible to refer to natural world and mathematical problems such as complex systems and P≠NP problems [1]. Here, as a basis for these problems, and as a method for analyzing social phenomena and problems such as combinatorial optimization problems and complex systems, we will introduce simultaneous equation formulation and numerical calculation of simultaneous equation solutions as a solution method for ground state spin glass models. Show the results.