Improving buildings’ energy efficiency while preserving indoor thermal comfort conditions of hot climate regions has been within the high-interest topics among academics. Researchers have noted that achieving both concepts is essential to improve buildings’ sustainability and energy management system. Therefore, it pushes the need to conduct a comprehensive review to maintain a common understanding of the topic and ensure solid foundations for future research. This paper aims to present a review on the state-of-art of Internet of Things (IoT) technology and Artificial Intelligence (AI) techniques to integrate better building energy management systems. This is achieved through a systematic literature review of 30 related papers from the past ten years. The paper argues that very few studies demonstrate the implementation of IoT-AI based methods in the building industry, and its full potential is not realized yet. Therefore, it calls for more attention from academics within the application perspective in the related field.