The complexity and uncertainties of harms caused by environmental pollution require that an evaluator must play a role as an assistant to the judge so as to improve environmental justice and to protect the rights of victims of pollution.From a practical perspective，however，China’s evaluation system is faced with numerous problems such as the coexistence of multiple regulators of evaluation organizations，qualification and neutrality problems with evaluation organizations，arbitrary evaluator hiring and training，varying service rates，unclear types of practitioners，inefficient evaluation technologies，insufficient qualified evaluation organizations and evaluators，and refusal of service for various reasons.Relevant authorities must improve the system for managing evaluation on harms caused by environmental pollution，and enhance the capacity of environmental regulation.Only by so doing can they make full use of the evaluation system in alleviating environmental degradation，facilitating changes in the way of economic development，and improving the way of environmental management.