Model of social-economic phenomena based on solid-state Ising model is formulated and used for computer simulation. The model is based on the lattice model of ferromagnetic or antiferromagnetic matter but takes deal with social phenomena. Set of agents of social-economic interaction is introduced into consideration. Agents take decision about participation in some sort of activity at discrete moments of time. The decision may lead to profit or to loss. It depends on previous history of the social-economic system. Dynamics of a system is defined by stochastic Markov process. Stochastic nature of the process is influenced by external and individual factors. The model is formulated algorithmically as a sequence of steps and is studied by means of computer simulation. Numerical results are given.