The main aim of this study is to investigate the users' opinion concerning the use of collection and services in the IARI library. Therefore, the study is focused on users' opinion not only in terms of use, purpose, and satisfaction level with the library collection and services, but also in terms of use of e-resources, and adequacy of library collection. The questionnaire was administered to students of the IARI to collect data regarding the use of collection and services and analyse the level of users' satisfaction. The Likert's scale and chi-square test were also employed. The survey revealed that there exist significant differences not only in the level of usage, purpose, satisfaction of the library collection and services, but also in terms of use of e-resources and adequacy of library collection. The researcher observed that the e-form of collection and services due to their high usage has become a significant part of the library in fulfilling the needs of the postgraduate and research students. To maximise the use of library collection and services, the library should consider all the possible aspects related to users satisfaction. This study highlights the use and non-use of library collection and services, and provides the library management an opportunity to review its collection and services as well as its policies.