How to calculate working time and wage is the most important labor condition to be stated on a labor agreement signed between an employer and an employee. Some industries have their specific requirements, which cannot be met if the working time and wage are fixed in a generally agreed way. Therefore, the working style under “system of job responsibility” appears along with the trend. However, laborers are somehow not machines. They not only need to rest, but also need to have family and social lives. Therefore, if the working style under “system of job responsibility” is freely and randomly developed, or even abused by employers, the health and income of labor must be affected. Their physical and mental conditions may not be able to afford the load. Even worse, some laborers may face extremely tragic consequences, such as committing suicide, or getting karoshi (death from overwork). How to seek for a balance in between has become an issue worthy of further exploration. The paper not only reviews the various important conditions stipulated in Article 84-1 of Labor Standards Act, but also checks the reasonableness of the system of job responsibility from different angles, including “whether the system of job responsibility should exist,” “application scope of the system of job responsibility” and “applicability of ruling out of part of the stipulations of Labor Standards Act.” Finally, the study gives a suggestion of amending the Act, with an expectation to solve the controversies between employers and employees.