Abstract: 【Purpose/significance】We propose university online public opinion situational awareness model focusing on the subject of public opinion, aiming at realizing the normalized awareness of students' thought dynamics and physical and mental health, exploring the personalized needs of different student groups, so as to provide a clear direction and guidance for the reform and innovation of the management service work.【Method/process】First, we design a collection strategy of opinion information focusing on netizen users to support the perception of opinion situation elements. Second, in response to the diversified university online public opinion informa⁃ tion, we propose a set of online public opinion analysis methods focusing on sentiment analysis, aiming at understanding the public opinion situation in depth. Meanwhile, we further propose methods for mining students' needs and perceiving students' thought dynam⁃ ics and behavioral characteristics. Finally, we select a university in Northeast China as an empirical case study, and use sentiment analysis and semantic analysis techniques to explore the personalized needs of students in the university, and describe their overall thought dynamics and behavioral trends.【Result/conclusion】The results show that the university online public opinion situational awareness model constructed in this study can effectively present the behavioral characteristics of university students in cyberspace. 【Innovation/limitation】reveal their common behavioral patterns and core needs, and then provide a reference basis for the manage⁃ ment and service work of universities in the new era.