ObjectiveTo investigate the evening outpatient service demand in West China Hospital, in order to provide better service. MethodsUsing self-questionnaire, we investigated 1 734 outpatients and the data were analyzed with SPSS 16.0 software. ResultsA total of 90.7% of the surveyed patients reported that it was necessary to have evening outpatient service, 53.1% of the patients were willing to come to the hospital in the morning, and 4.2% prefer to come to the hospital in the evening. ConclusionEvening outpatient service in large general hospitals is getting high social affirmation. It is helpful to those who are inconvenient or unwilling to come to the hospital during day time, and is a complement for day-time outpatient and emergency outpatient service. Consultation time and resource arrangement in the evening outpatient service should conform to the principle of rational allocation for hospital resources.