Abstract: Ho Leung Debate focuses on heterogeneity and can not be changed to intersubjectivity. An effective two-way dialogue mechanism can not be constituted between people and fish. The judgment that fish is happy is limited to the level of unidirectional confirmation, lack of a double-sided confirmation. The essence of happiness of fish is the happiness of people. The happiness found by people from fish is the joy of his own rather than the joy of fish. The recognition of this happiness is from a bystander’s point of view and lacks intrinsic acknowledgment mechanism