Smart wearable devices have become more and more popular in our daily life due to their unique power of “wearing-while-using.” However, requirements of light weight and compact size lead to limited on-device resources in most wearable products, which hamper the development of wearable technology. Edge computing provides an opportunity for wearable devices to access more resources without violating the constraints on weight and size.

In this article, we first investigate the drawbacks of wearable devices and explore the potential of addressing such drawbacks by edge computing. Then we conduct a comprehensive survey on existing works from four aspects, i.e., computation scheduling, information perception, energy-saving, and security. Finally, we point out several future research directions worth our attention. We believe that wearable devices enhanced with edge computing technologies would bring more benefits and convenience to our life shortly.

智能可穿戴设备凭借其独特的“即戴即用”功能，在我们的日常生活中越来越受欢迎。然而，大多数可穿戴产品对轻量化和紧凑尺寸的要求导致设备上资源有限，阻碍了可穿戴技术的发展。边缘计算为可穿戴设备提供了在不违反重量和尺寸限制的情况下访问更多资源的机会。

在本文中，我们首先研究可穿戴设备的缺点，并探索通过边缘计算解决这些缺点的潜力。然后，我们从四个方面，对现有工作进行了全面的调查即计算调度，信息感知，节能和安全性。最后，我们指出了几个值得我们关注的未来研究方向。我们相信，通过边缘计算技术增强的可穿戴设备很快就会为我们的生活带来更多的好处和便利。