Abstract: The rapid of ICT devices development has impacted in excessive information dissemination. Unfortunately, the response of education world especially school still relies on the information access and the ability of the student using ICT tools. This research aims to find the impact of the application inquiry learning method on student’s critical thinking skill. This research was conducted on Elementary School students of Simokerto VI / 139 Surabaya. The method used is the experimental method using treatment design by level 2 x 2