Labor and community are the core issues of Marxist philosophy. The happiness of people is the practical embodiment of the unity of the two, and the construction of social community of human beings should be achieved through labor. Starting from the ontology of labor, Marx expounded the nature of labor philosophy by the defi nition of labor and the criticism on alienated labor, whilst he also elaborated on the value purpose of labor happiness through labor and human's free rights, and people's self-confi rmation and development needs. Based on this theoretical premise, taking labor as the logical starting point of human's free and all-round development and the fundamental basis for the historical construction of human social community, and through the two-way movement of subject objectifi cation and object subjectization, Marx perceived the unity relationship between human and human self-isomorphism, human and natural life community, and human and the community of human destiny is historically established, so as to realize the original pursuit of happiness of all people, making human society a happy community.