This research explores the legal system of Saudi Arabia through different stages of legal system development. The legal system of Saudi Arabia reflects the nation's religious and cultural values. Sharia classifies as one of the fundamental sources of law in the Kingdom, in addition to Statutory Law, and Royal Orders. The basic foundation of Saudi Law is the Ottoman law and Hanbali School of Thoughts. The legal system is reflected in a very minute duality due to the dominance of a few French laws in the basic of Ottoman laws, but Islamic scholars consider these laws alien to the Sharia. The Islamic scholars consider the Sharia as the legislative authority and God is the only legislator. A lot of reforms are taking place in the legal system of the Kingdom according the modern age, but these all are following the basic principles of Sharia.