At present in line with shariah principles several Islamic financial institutions are engaged in product development activities globally to cater the needs of a wide range of parties. However, considering the essentiality for these institutions to innovate and operate within the ambits of shariah, need of the shariah supervision cannot be over stated. This research is focused on the topic of Governance Shariah supervisory system. Among the main issues surround corporate governance in Islamic financial institutions is the role of the Sharia Supervisory. The main role of the Shariah supervisory system is to ensure the compliance of Sharia law along the entire business process. The Shariah supervisory system therefore plays a vital harmonizing role in Islamic banking, particularly with its function as the Sharia-compliance gatekeeper. The paper attempts to discuss these functions in detail and tries to shed a little light on established laws in some countries regarding regulations of the Shariah supervisory system and operations of Islamic financial institutions.