Abstract: Objective To compare the value of Rome Ⅱand Ⅲdiagnostic criteria in diagnosis of nausea and vomiting in off icers and men of Chinese PLA Navy. Methods A questionnaire was designed according to the characteristics of Chinese PLA Navy off icers and men and the Rome Ⅱand Ⅲdiagnostic criteria.A total of 8600 Chinese PLA Navy off icers and men in active service were investigated by random sampling from 3 different regions. Results The total prevalence of nausea and vomiting was 6.6% according to the Rome Ⅲdiagnostic criteria, with chronic idiopathic nausea (CIV), functional vomiting (FV) and cyclic vomiting syndrome(CVS) accounted for 3.6%, 1.1% and 1.9%, respectively.The prevalence of FV was 7.1% according to the Rome Ⅱdiagnostic criteria.The prevalence of CIN, FV and CVS was higher in males than in females and in the southern region than in the eastern and northern regions. Conclusion The detection rate of FV is higher by Rome Ⅱthan by Rome Ⅲdiagnostic criteria, but the Rome Ⅲdiagnostic criteria are more scientif ic.