[Objective] Rice paddies have important ecological service value. We aimed to quantify the ecological service value of rice paddies by surveying the urban and rural residents' willingness to pay for paddy ecosystem service value.[Methods] Taking Suzhou City of Jiangsu Province as a case, the ecosystem service value in paddy field and the willingness of urban and rural residents to pay for the paddy ecosystem service value and its influential factors were evaluated by adopting contingent valuation method(CVM) and related econometric model on the basis of paddy ecosystem services and their valuation methods.[Results] (1) Paddy ecosystem service value of Suzhou City was 3.75×10¹⁰ yuan. Per unit area of paddy ecosystem service value was 4.52×10⁵ yuan/hm²; (2) 68.99% urban interviewed families and 65% peasant families have the willingness to pay for paddy ecosystem service value. Their payments were 1 230.43 yuan per household and 434.67 yuan per household, respectively; (3) Educational level, the numbers in eachhousehold, proportion of labor force, numbers of raising dependents, household income and others, are important factors that affect willingness to pay of urban and rural residents.[Conclusion] Paddy ecosystem services value is very important. It is necessary to incorporate the paddy ecosystem services value into resource allocation decisions, to establish ecological compensation regime for paddy field.