[Summary] Objective The cognitive degree of obstructive sleep apnea (OSA) in Guizhou was evaluated by questionnaire survey. At the same time, the diagnostic value of type IV portable sleep monitor (PM) for OSA patients was discussed by observing the differences in sleep parameters of different sleep monitors. Methods The questionnaire was designed and investigated in Guizhou. At the same time, 101 patients suspected of OSA were randomly selected to use type IV PM and PSG synchronous overnight monitoring; 15 cases were simultaneously monitored overnight using type IV PM and type III PM. Then the clinical parameters of different monitoring methods were compared. Results (1) Among medical staff investigators, the higher the hospital level, the higher the education level, the higher the professional title, the higher the understanding of OSA professional knowledge. (2) Among non-medical staff respondents, women and respondents with knowledge of OSA paid more attention to OSA. (3) 69.7% of medical personnel tend to recommend PSG monitoring, while 8.7% recommend type III PM monitoring. Additionally, 5.8% tend to recommend portable ring preliminary screening, and 4.6% choose to recommend wristwatch blood oxygen monitor preliminary screening. It is worth noting that 11.2% of medical personnel do not know which method is appropriate to recommend. (4) Using PSG as the gold standard, the sensitivity of type IV PM was 95.9 %, the specificity was 66.7 %, the positive predictive value was 97.9 %, and the negative predictive value was 57.1 %. The evaluation results of the three sleep monitors on the severity of OSA were different, and the difference between PSG and type IV PM was statistically significant ( P < 0.01 ). (5) Spearman rank correlation analysis showed that type IV PM was positively correlated with AHI value, LSaO2, SIT90 and SIT80 measured by PSG. Conclusion Both medical staff and non-medical staff have a low awareness rate of OSA professional knowledgeType IV PM has a certain diagnostic value in patients with suspected OSA, but there are differences in the assessment of the severity of the disease.