Tracking Spending On HIV AIDS is Important to obtain information on how resource allocation for this priority programhas been done. It Tracked down of fund, who are providers of provision, for what function (how it has been used) and who are the beneficiaries. The authors shered their experiences in conducting some studies related to health economics of HIV AIDS in Indonesia, the method and result and some challenges in conducting the studies. the authors described a lesson learned from how the country work and finance a priority program like HIV AIDS