Earlier in the day, he also took over the reins of the AU committee for climate change.
Ramaphosa said SA wanted to pursue non-members of the APRM to join.
Before Ramaphosa spoke, Zimbabwean President Emmerson Mnangagwa announced that his country was joining the APRM in a move that is aimed at deepening democracy in that country.
Mnangagwa said his country has undergone a number of reforms meant at enhancing democracy.
“To date, we have made cross-cutting reformed to achieve an accountable state,” he said.
Seychelles too joined the APRM on Saturday.
Ramaphosa said the APRM was a mechanism from Africa for Africa.
“It is a vehicle for advancing unity, self-determination, freedom, progress and collective prosperity. In the end, the APRM must be seen for what it is. It is a driver for change,” he said.