Employees "whistling" to the media or the relevant regulatory authorities can promptly stop the illegal or even infringement of the public interest of the company and play a role of alleviating the pressure of government regulation. However, whistle-blowing by employees, while safeguarding the public interest, violates their loyalty obligations to the company. The justification of employee whistling stems from the exercise of the constitutional freedom of speech and protection of the public interest. How to standardize employee whistle blowing, whistle-blowing employee side-effects, is an important issue currently facing the legal construction in our country. The key to achieving effective social supervision through employee whistling lies in clarifying the boundaries of the exercise of all rights according to law. The whistle-blow motivation of employees and the social effects of their realization are all important factors in measuring this boundary. Through the construction of related supporting measures, employees are guided to rationally "whistle" within the boundaries so as to truly protect the public interest.