Wearable robot technology is concerned recently as a state-of-the-art application of human-robot collaboration (HRC) in the industries. The objective of this thesis is to identify a few critical quantitative criteria for evaluating the usability of the wearable robots to secure the practicality.Due to the lack of active experienced workers in HRC environment, similar mechanical systems already in use are considered to identify the user requirements that are grouped into six qualitative usability categories: fitness, effectiveness, intuitiveness, stability, practicality, and safety. A few quantitative measures are suggested as possible corresponding criteria for the usability within each category. The quantitative criteria and ways of their measurements are refined throughout interviews with focus group experts and these will be a basis for developing standard usability evaluation procedure in the wearable robot technology.