Abstract
This paper studied the problems of parameter system construction for large-scale Internet of Thing situation assessment. It also states the research of situational awareness and assessment of IP network briefly, the situation assessment differences between Internet of Thing and IP network are dicussed, for some especial aspects and the significance about large-scale Internet of Thing situation assessment are presented, and several serious problems faced the current establishment of situation evaluation index system firstly are given. Finally, an indicator of the situation assessment model and discussion on how to generate all kinds of parameters are given out as a example, and the above research works makes a foundation about the Internet of Things' situation awareness and situation assessment.