In the ninth and tenth century Shiism was selected as the official religion of Dakan by some of the Muslim governors' families. These loyal families were branches of Bahmanian which were the first independent Muslim government in the south of India. The Bahrnanian were unsparingly supporting Sadat (The prophet's family offspring) and the Shiites. The ninth Sultan of this dynasty, Ahmad Shah Vail (825-539), chose Shiism as his religion and supported many of the Shiite scientists and politicians in his governing territory. In this era and before that many Shiites and Sadats migrated from Iraq, Iran, and other Islamic territories to Dakan. Some of them such as Sadr o Al-Sharif Samarghandi, Mir Fazllollah Anjavi Shirazi, Sheikh Azari and Mohammad Gavan were given political and official positions. However, these were the preconditions set up in Bahmanian period for Shiism to be the official religion. This paper is an attempt to analyze the Shiite's condition in this era and their relations with the Bahmanian Sultans. Also this study tries to analyze the first signs of the advent of Shiism in Dakan.