Work safety accidents involving contractors are continuous to occur,which indicates that more attention must be paid to the environment of business outsourcing and its deep impact on enterprise safety management.

The author believes that network,producing technology and professional trust is the three factors that influence business outsourcing in China s passenger transportation company.

The paper discusses the necessity of outsourcing of library business,analyzes the advantages and disadvantages and puts forward the countermeasures to avoid the disadvantages in library business outsourcing.

Practicing and Thinking on the Library Cataloging Outsourcing of University Libraries;

Briefly on the quality control of the outsourcing of library cataloguing;

Challenge and Reflection on the Status Quo of Libraries Cataloguing Outsourcing in Our Country;

According to principal-agent theory, the paper analyzes the principal-agent problems in the agro-machinery outsourcing such as moral hazard and incentive mechanism designing owing to the asymmetric information, and gives the model of principal-agent relationship between the outsourcer and the agricultural machinery service provider.

At present, more companies practice outsourcing as to reduce costs, improve product quality and quantity in one way and upgrade its own competence in the other by transferring portions of work to outside suppliers.