E-procurement is an electronic procurement system that became a key factor required to manage financial aspect of a country with appropriate controls and protected by legal policies. The Presidential Regulation in Indonesia expect all government institutions to run the e-procurement process following the procurement principles, namely effective, efficient, transparent, open, competitive, fair and accountable. However in the implementation of e-tendering, which is part of e-procurement, found there are practices that not in accordance with the procurement principles. In this study, an in-depth analysis conducted to evaluate the tender activities of the ministry in Indonesia. We apply data mining process towards the national procurement portal to analyze tender data and find the hidden pattern that would be useful to support the decision-making process. This study combines several techniques, e.g. web mining and statistical analysis approach. Our finding includes correlation patterns among a number of values existing in e-procurement portal.