 Micromotors have been widely used in various fields due to their small size, high efficiency, and low cost. They are capable of performing tasks such as sensing, transportation, and drug delivery. This paper reviews the recent advances in micromotor technology with focus on their propulsion mechanisms, sensing strategies, and applications. The paper firstly introduces the two main types of micromotors, namely fuel-based and fuel-free propulsion. It then elaborates on the sensing strategies of micromotors, including speed-based sensing, fluorescence-based sensing, and other strategies. Furthermore, the paper provides several examples of micromotors being applied in different fields, such as environmental science, food safety, and biomedicine. Lastly, the paper discusses the challenges and opportunities of micromotors in sensing. This article was authored by Li Jun Kai, Dong You Su, Zeyu Zhang, and others.