Cash Waqf funds has an important role to empower the economy of Ummah. Unfortunately, the collected cash waqf fund is still very small compared to its potential number. Against this background, this research aims to design systems that may enchance the role of Islamic banks in cash waqf fund raising. This paper employed Interpretative Structural Modeling (ISM) by conducting literature studies and In-depth interviews with some regulators, practitioners and academicians. The result shows that experts and practitioners agreed that the strong legal support on cash waqf is necessary to enhance the role of Islamic Banks to raise cash waqf funds. It creates a sense of secure to the stakeholders. Furthermore, it requires a strong coordination between Indonesian Waqf Board (BWI), Ministry of Religious Affairs, Bank Indonesia (BI), Financial Services Authority (OJK), Nazhir and Islamic Financial Institutions that may receive cash waqf (LKS-PWU) in order to boost the role of Islamic Banks. The main obstacle that must be tacled soon is the lack of education about cash waqf.