The potential advantages of phase-field modelling of molecules should be discussed. (1) Phase-field modelling directly calculates time-averaged dynamics, that is, direct coarsegraining of time scale. This is different from conventional coarse-graining modelling because their coarse-graining of time scale is brought by coarse-graining of molecules. This suggests that phase-field modelling may be able to solve problems that conventional MD cannot solve. For example, the crystalization of molecules is a difficult task for MD simulation. This is because crystalization is a long time scale phenomena but the coarse-graining of molecules cannot stabilize crystal structures. (2) Research so far has demonstrated that phase-field modelling can be combined with other phase-field modelling. This indicates that our phase-field modelling may also be combined with other phase-field modellings. For example, combining with fluid dynamics may reveal molecule properties under fluid turbulence.