The union is one of the basic economic system of market economy country, scholars have made a number of studies in the union, but from the perspective of property rights to the study of trade unionism.Property of the existence of the union system is rooted in workers' rights is in the nature of public goods and workers' rights are often in the public domain between workers and employers.Trade unions in the face of trade union members, are running mechanism of public goods supply directly and indirectly increase as well as the adjustment mechanism of social capital;Facing employers, trade unions are running infringement risk prevention mechanisms, the collective voice and punishment mechanism after employers infringement behavior modification is invalid or collective exit mechanism of human capital;In the face of the government and society, it is on the basis of the former two, through participation in and influencing the government's public policy and legislation, narrow the rights of the public domain between workers and employers, for social support, etc., obtained the external environment conducive to the workers' rights protection.The economic and social effects of trade unionism running, you can from two aspects: internal and external analysis.Trade union system running effect is the improvement of workers' wages and welfare, as well as the improvement of working conditions, while the external effect is the expansion of the labor cooperation order, the emphasis on social equity and sustainable operation of the market economy system.