Flood event occurred in Chao Phroya River of Thailand in 2011 induced a great disaster to the local people. During and after the flood Chinese Government sent experts to Thailand to offer some consultant about the flood disaster reduction. All the work carried by the Chinese experts were highly evaluated by the Thai Government and people. This paper briefly evaluated the flood event. Some problems were also discussed based on the international experience on flood disaster reduction. Some suggestions about the following actions to strengthen the flood disaster prevention capability were listed.