Abstract: Introducing network science theories， the evolution mechanisms of different network scales were analyzed based on lots of data provided by the CAIDA project. As to the topologies of IPlevel and ASlevel， the correlation between the two levels and the characteristics of dynamic nodes were analyzed， including the dynamically changing proportion of birth/death nodes， preferential attachments and the number of stable attachments. The conclusions are as follows: firstly， IPlevel nodes are more active; secondly， the evolution of IPlevel nonpreferential attachments is more stable， and thirdly， the number of IPlevel stable attachments is much greater. The evolutions of the dynamic nodes in different measure levels are different in essence， which can provide a valid basis for understanding the Internet evolution mechanism.

Key words: network science, measurement level, preferential attachment, stable attachment, evolution