As a conviction formed by analysis there exists inner link between economic cybernetics and sustainable development of social economy in the era of knowledge economy.

Economic Cybernetics is a subject which uses modern control theory to research economy system\'s law of development and optimal control,so it\'s a important branch of Cybernetics.

This paper analyzes Stability of Macroeconomic Models by the economic control theory and methods.

The applications of Economical Cybernetics and its future trends in mineral economics were also discussed.

That the auditing essence is economic control is evaluated.

This paper makes a comparison among the existing organization forms of agricultural industrialization by applying Yang Xiaokai s theory of economic control and growth limited model,in order to provide a theoretical guide in government efforts to accelerate agri.

This paper proposes a new economic control system, All Set Economic Control Machine (AECM), which includes information analysis, object confirmation, forecast, decision and so on.

The fuzzy control modeling with application to the economy control theory;