Overall, the variable regulation of sterically hindered solvents of porous ionic liquids endows them with excellent catalytic conversion performance, and also accelerates the further development of porous liquids in the field of catalysis. However, although the research of porous liquids in the field of catalysis has made phased progress, there are still several unmet challenges: (1) The complex synthesis steps and high cost of porous liquids limit their large-scale application in industrial catalysis. (2) As the research on porous liquids is still in the initial stage, except for the good catalytic performance of ionic liquids, the advantages of other sterically hindered solvents in the field of catalysis have not been explored. (3) At present, the prepared porous liquids have some problems, such as cavity collapse, cavity plugging and poor interface compatibility between porous solids and solvents, which lead to unsatisfactory stability of porous liquids. Therefore, it is significant to find sterically hindered solvents which are easy to synthesize, cheap, large size and helpful for catalytic conversion. In addition, by introducing surface functionalized porous solids to enhance the interaction between them and solvents, a stable system with high compatibility can be obtained. Tackling the above challenges will be the definite goal of future endeavors, and will contribute to the wider application of porous liquids in the field of catalytic conversion.