The objective of this research is to provide data for the power dressing of femalepoliticians when analyzing the fashion styling of Margaret Thatcher. The method is basedon considering Margaret Thatcher''s life and political career, together with the powerdressing of politicians from domestic and foreign literature, advanced research and internet. In addition, 133 clothing photos of Margaret Thatcher''s costumes are collected from theinternet and several web-sites. The fashion styling being displayed from 4 May 1979 to 28November 1990 are classified with the 1st term, 2nd term, 3rd term depending on theprime minister. We then analyze items, colors, patterns and fashion accessories. And alsoobserve the power dressing through Thatcher''s fashion styling. The results of this study areas follows: Margaret Thatcher expresses authority through blue clothes which symbolizesconservatism at conservative parties, black clothes at formal parties, two or three piece ofvarious colors at international conferences. She also has simple and impressive stylesemphasizing accessories such as ribbons or pearls necklaces and earrings, brooches, andhandbags. Margaret Thatcher fulfills the styling power dressing of a strong and femininefigure by using items symbolizing authority as a powerful woman.