Abstract: The methane emission fluxes from rice after wheat and single rice field have been measured in Beijing area from 1990 to 1992. CH₄ emission flux for single rice was about 8. 5-10. 0 mg/m²·h and for rice after wheat was 17. 5 mg/m²·h. The amount of organic base fertilizer added was the major factor affecting methane emissions (dry-seeded rice field and rice field without organic matter input have lower emission than other treatments). The use of scientific irrigation (intermittent irrigation) with suitable amount of organic base fertilizer could either increase rice yield or reduce methane emission, but it was also observed the increasing emission of another greenhouse gas N₂O under the stage of dry and moisture water management.