The Paris Agreement，a landmark achievement of climate change negotiation，reached in December 2015，set 2℃ target of average global temperature increase control by the end this century. Most mitigation scenarios under 2℃ target require large-scale deployment of BECCS，a technology that is alleged to bring “negative emissions”，by 2050. By reviewing the inclusion of BECCS in IAMs and emission scenarios and current development status of BECCS demonstration projects，this paper discussed major challenges and contingencies of the development of BECCS，and pointed out that without major technological breakthrough or sufficient funding，the chance of developing BECCS into a key technology for realizing 2℃ target is slim.