This paper uses investment decision theory to analyze and discuss on renewal of equipment of construction company and equipment configuration of project.

Scientific evalnation of decision-making about enterprise equipment renewal;

This paper introduces the selection principle of equipment renewal scheme.

This paper attempts to introduce real option into the equipment renewal for farming machine.

Changes of Function and Equipment update on Basic Biology Laboratory;

Study on the optimization of model and decision-making of the best time of equipment update

Aiming at a great deal of calculating work of decision-making analysis on equipment update,the approach of decision-making analysis was researched by using Excel,which validity was illustrated.

Research on equipment replacement decision cooperative system based on multi-agent;

Moreover, a method for calculating the optimum economic life of equipment is put forth, which serves as a theoretical basis for the determination of reasonable life of equipment replacement.

So, this study can not only provide a scientific basis and reference for equipment stratified management and equipment replacement of agro-machinery enterprise, but can provide a new idea for equipment management decision, and extend the application of extenics.