Our paper having the title: “A Web based modular environment for Assisting Health Policy Making Utilizing Big Data Analytics” has been accepted at the 9th International Conference on Information, Intelligence, Systems and Applications – IISA2018. In this work we present the conceptual design of a Web based environment called Policy Development Toolkit (PDT), which aims to promote the exploitation of heterogeneous holistic health data and pre-existing knowledge on public health policy models. The project is co-funded by the Horizon 2020 Programme of the European Commission Grant Agreement number: 727560 – Collective wisdom driving public health policies – CrowdHEALTH.