In September of 2014, the World Climate Research Programme (WCRP), working closely with Working Group I of the IPCC, organized a meeting on the topic of Lessons Learnt for Climate Change Research with respect to the recently published IPCC AR5 on the campus of the University of Bern. This workshop was aimed at informal exchanges and brain-storming between scientists involved in climate change research coordination and those who served as authors on the IPCC AR5. Its main purpose was to take stock of key scientific issues identified through the IPCC assessment in WCRP's research plans. During three days of intense presentations and discussions, the participants evaluated climate science, WCRP directions and plans, and future needs for research and assessments. Eight themes were presented to be included as the grand challenges of future climate change science, including clouds, circulation and climate sensitivity; understanding and predicting weather and climate extremes; changes in cryosphere; regional climate information; regional sea level rise and coastal impacts; water availability; biogeochemical, aerosols, atmospheric chemistry aspects; decadal timescale quantification: attribution and prediction. These themes cover the six grand challenges of WCRP and other challenging themes in climate science. This paper presents a brief introduction about this meeting in terms of the meeting report, so as to provide some references and information for the future climate change research.