The Positive effect of foreign investment includes inflow of stable capital from abroad and various effects such as increase of economic integration, raise of competition, transfer of technology, improvement of international balance of payments, and the promotion of employment. Therefore the greater part of countries in the world drive forward lasting liberalization of investment system. The keynote of economic policy of the Central Asia countries is bound for simultaneous direction, i.e., export-oriented and import substitution industrialization policy and the present each government's policy focuses on extension of inward foreign investment. For revitalization of domestic and foreign investment and accomplishment of development of industry and economy, every government authorities in Central Asia should establish proper and timely policy of foreign investment attraction and should actively attract foreign direct investment. Furthermore the Central Asia countries must set up and perform strategies in accord with actual circumstances. It is necessary to expand and support investment incentives, for example tax incentive system on foreign investment into each Central Asia countries, especially in regard to priority field for economic development of itself, including economic development project with priority.