This paper is the first part of a review of how to realize the Universal Health Coverage (UHC) goals by 2030. The objective of this review is to investigate the role of eHealth and technology in achieving UHC, focusing on four aspects: 1) identifying the importance of UHC and highlighting how UHC is influenced by health systems and eHealth, 2) investigating the current status of UHC worldwide and indicating the current challenges facing the realization of UHC, 3) reviewing the current research activities in the UHC domain and emphasizing the role of eHealth and technology in achieving UHC, and 4) discussing the results of the review to identify the current gaps in UHC implantation and the corresponding research lines for future investigation.This part covers the first two aspects through: providing the required background on UHC, highlighting the potential benefits of eHealth utilization in UHC, addressing the current status quo of UHC implementation worldwide, and finally concluding the lessons learned in terms of the UHC challenges and requirements.This part also described the used search methodology and selection criteria to synthesize this review. It also indicates the limitations of conducting a systematic review in this early stage of deploying UHC-oriented eHealth solutions.