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We propose a postulate $\dot{q} =MH$ concerning temporal variation ofquintessence field $q$ where $H$ is Hubble parameter ($=\dot{a}/a$) and $M$ isthe scale characterizing the field. Using the postulate we uniquely determinesa dynamical model of the field. The potential of the field satisfies thetracking condition. The minimum of the total energy density of matter and thefield is located at $a=\infty$. We show that the present tiny dark energy iscaused by early inflation, while the energy is comparable to Planck scalebefore the inflation. Since the model is reduced to $\Lambda$CDM model in thelimit $M\to 0$, it is a natural generalization of $\Lambda$CDM model.

A Quintessence with Tiny Dark Energy Induced by Inflation