Based on the data statistics of a survey on 698 social organizations, the researcher has reached a conclusion differing from the previous positive attitude to the estimation of roles of social organizations in disaster response. There are three characteristics in the estimation on the function of social organization in emergence reduction; the level of actual role of social organization is lower than that in the expectation, both scores high on the work of social organization and governments, as well as great expectation on the governments’ role in disaster response. Reasons for that are weakness of China NGO, unbalance of relations between governments and NGOs, and independence on the governments. It is necessary to take measures to awake the awareness to social organizations as an essential part in order to establish an integral effective mechanism of great crisis response.