The present study pertains to a vanadium/titanic-based catalyst for removing nitrogen oxides at a relatively low temperature window. More specially, the present study relates to a vanadium/titanic-based catalyst containing VOx (x < 2.5) and having excellent ability to remove nitrogen oxides at a wide temperature window, particularly at a relatively low temperature window and a process for removing nitrogen oxides using the same. In this study, various TiO2 supports have been tested to determine the role of support. Raw TiO2 were examined a variety of physical properties. Also comparing with commercial V2O5/TiO2 catalyst, the activity of various VOx(x < 2.5)/TiO2 in this study have quite different values.