This study was carried out to investigate the effects of irrigated water management to CH₄ emission from the paddy fields. It was designed with (1) continuous flooding (CF) and (2) alternate for wetting and drying (AWD) which the water level was controlled + 5 cm and ± 5 cm than the soil surface, respectively at Cho Moi, Chau Thanh, Thoai Son and Tri Ton districts of An Giang province. The soil samples were collected to determine their physico-chemical properties. CH₄ was collected weekly during the rice cultivation, and the rice yield was determined at the harvest. The results showed that pH 4.55 – 5.93, EC 105 – 175 µS.cm-¹, organic matter 3.21 – 3.94 %, CEC 25.05 – 33.33 cmol.kg^-1 of the soil were suitable for rice growth. The average rice yield was about 4.5 - 6.52 ton.ha^-1. CH₄ emissions of the AWD decreased 59.1 % compared to the CF which was 14.6 mg C-CH₄.m^-2.h^-1. Therefore, the AWD is better than the CF in term of reducing CH₄emissions to the environment.