Georg Simmel’s understanding of currency communication has been ignored by previous studies.Starting from his general thought,this paper attempts to clarify his media thought under his ideological system,answer the question why money is a medium,and discuss the media connotation of money.On this basis,this paper develops the explanatory theory of money in the dual dimensions of relationship-action,and constructs a processual framework of taking money as the medium to analyze social communication.The framework points out that the influence of money on communication ultimately points to the communication sociological meaning of free communication,which has connotations for the objectivity and networking of social relations,the individualization of social action subjects and the diversification of social action paths.At the same time,free communication also shows the characteristics of high-speed interaction and interpersonal indifference under the alienation of money.