National Library of Indonesia (NLI) is a public library located in Jakarta that was established in 1980 by the decree of Ministry of Education and Culture. This day NLI has already applied digitalization of its contents and its management with IT, IT has been an important aspect in an organization. The objective of IT implementation is to increase effectivity and performance in organization. In order to get maximum results good IT Governance is needed in order to align IT with business, the better IT Governance the greater outcome that the organization will get. The objective of this research is get an overview about the level of IT Governance on going, the analysis tool will be used is COBIT 5 focusing on DSS domain. The average score of DSS01, DSS02 and DSS 03 is in 1.2 to 1.6 and for the DSS04, DSS05 and DSS06 domain the average score is between 2.1 and 2.4

National Library of Indonesia (Perpusnas) is a public library located in Jakarta. In its operations Perpusnas already implemented Information Technology (IT) to support its activities, in IT implementation good IT Governance is needed to ensure that the IT is working consistently with business and produce the expected output. IT Governance is structure, process and mechanism that also includes objective making of the organization while considering the organization’s capability. With the good IT Governance Perpusnas can allocate its resource more efficiently and measure the running performance. This research will use COBIT 5 as the framework, the reason why COBIT 5 is chosen because COBIT 5 provides comprehensive framework that could help Perpusnas in achieving its IT Governance and IT management objectives. COBIT 5 enables IT to be organized and managed in the whole organization, it also could provide balance between the realization of benefits and risk optimization. Observation and interview is done in order of data collection in this research, the data then is analyzed and measured with the capability level in COBIT 5. Based on the analysis conducted the result obtained is. The average capability level of EDM01 is 1, on EDM02 is 3, on EDM03 is 2, on EDM04 is 3 and on EDM05 is 3. This research also provides recommendations that can be used as reference for Perpusnas to increase the performance of its IT Governance