Individual emotion can significantly impact one's well-being and a team's emotional environment can affect team performance. In addition, one's emotions in a team can affect others’ emotions. Thus, in order to have a positive team emotional state (environment) and avoid one's negative emotions propagating to others, a team emotion forecast tool is needed for teamwork management. How to design an easy-to-use team emotion forecast tool is our research question. In this study, we first propose to use keystroke and mouse dynamics as potentially effective signals to recognize emotions because of their ubiquity in the work environment, especially in remote work. And the emotion recognition process is non-intrusive and unobtrusive, which helps to identify emotions more objectively. Second, the user-centered design method is used to design such a tool/system. Third, a qualitative study has been conducted to analyze users’ demands and concerns. At last, a digital prototype has been designed and developed.