As one working in a University library,librarians’ professional happiness has directly affected their physical and mental health and work efficiency.

With the development of teachers professional specialization, more experts and scholars come to focus on researches into the relationship betweeen teachers vocational happiness, which is teachers internal motivation and leading precondition of completing educational tasks, and professional development.

The inner root of the absence of teachers vocational happiness is the view which regards teachers vocation as "a way of making a living".

In fact,it did not mean the production of professional police,which met the needs of Capitalism economics,politics and society and became a symbol in the vocationalized path of police development.

We can learn a lot from the following methods of foreign police s employment: to pay more attention to the employment s propaganda tactics; to employ police of different levels; to have employment standards with the characteristics of police profession; to employ civil policemen.

Police professional knowledge is the base of the professional quality, the police professional skill is the essence of the professional quality, and the professional ethics is the soul of the professional quality.