Samoa is the first Pacific Island country to gain independence. In the course of striving for national independence，Samoa basically has an organic combination of western culture and local culture，and it nails its transition orderly from managed government to independent government by peaceful means. Based on western constitutionalism model，Samoa still retains its own national characteristics. The course of Samoa striving for independence provides reference and model for other Pacific Island countries. In the following two or three decades，other Pacific Island countries also gained national independence in succession.