The purpose of this research is to understand and determine the form of DPRD supervision of infrastructure development in North Lombok Regency, whether supervision by the DPRD of North Lombok Regency has been implemented effectively, and what obstacles are faced during the implementation of supervision in North Lombok Regency. The research method used in this research is normative legal research, using a legislative approach, a conceptual approach and a sociological approach. The results of the research are the form of supervision implemented by the DPRD of North Lombok Regency, namely using preventive supervision and repressive supervision. Preventive supervision is carried out from the planning stage, budget discussions, evaluation of implementation documents (DPA), to monitoring the readiness of regional apparatus organizations (OPD). Meanwhile, repressive supervision is carried out after the activity is underway through field reviews, administrative evaluations, summoning OPDs, and providing recommendations or notes on improvements to projects deemed not in accordance with planning and legal provisions. The obstacles faced include technical constraints, budget limitations, weak coordination with OPDs, limited technical capacity as DPRD members, and a less than optimal project monitoring and documentation system, along with political factors and limited access to information also affect the independence and quality of supervision.