Appearance of a number of management systems with various and sometimes divergent demands, demands for revise of optimal strategy on implementation of these standards in small and medium-sized enterprises (SMEs) and the attempt on their integration into integrated management system are suggested even more. Firstly question on choice and reasons for implementation of standards is raised. Management and employees expect benefits on the implementation and they pass and minimize the implementation barriers. Basic concept on integrated management system (IMS) into SMEs and analyse on reasons, advantages and barriers at IMS implementation are presented in this paper.