The virtual subsistence of undergraduates is the behavior that the group of undergraduates do some- thing like learning,working,disporting and so on by taking advantage of modern electronic communication, net information and resources, under the state of physical body in absence, in the digital condition of bit in unit. On the one hand, it meets the needs of the undergraduate’s learning,entertainment,social intercourse, self- determination, equality and self-fulfillment. On the other hand, it brings them negative influence on the matter of psychology and behavior. Measures should be taken to cope with it.