The study aims to establish the concept of customerized research information services in academic libraries and to build librarians’ consensus on the need for customerized research information services. The literature review enabled summarizations of the definition of research information service, customerization, and research trends. A categorization process resulted in a list of research information services of academic libraries. The Delphi method survey revealed the necessity of providing research information services and applying customerization to research information services based on the opinions of librarians. The librarians agreed on eight research information services using customerization services. This study has significance because it proposed new attempts to improve and develop research information services and explored ways to enhance the expertise and value of academic libraries by forming a consensus among librarians.