For ≥ 2 and ( ) := | | −2 , we propose a new estimate approach to study the existence of Aubry-Mather sets and quasiperiodic solutions for the second-order asymmetric -Laplacian differential equations ( ( )) + (, where and are two positive constants satisfying −1/ + −1/ = 2/ with ∈ R + , ( , ) ∈ 0,1 (S × R) is a continuous function, 2 -periodic in the first argument and continuously differentiable in the second one, ± = max{± , 0}, = 2 ( − 1) 1/ / sin( / ), and S = R/2 Z. Using the Aubry-Mather theorem given by Pei, we obtain the existence of Aubry-Mather sets and quasiperiodic solutions under some reasonable conditions. Particularly, the advantage of our approach is that it not only gives a simpler estimation procedure, but also weakens the smoothness assumption on the function ( , ) in the existing literature.