The World Health Organization Assessment Instrument for Mental Health Systems (WHO-AIMS) was used to collect information on the mental health system in Ghana for the year 2011. The goal of collecting this information is to improve the mental health system and to provide a baseline for monitoring the change. This will enable Ghana to develop information based mental health plans with clear base-line information and targets. It will also be useful to monitor progress in implementing reform policies, providing community services, and involving users, families and other stakeholders in mental health promotion, prevention and rehabilitation.