In this note,we consider the equations Δu= Ω∇u with the unknown vector ^(u∈W^(1,2)) (B_1^n, R^m). here Ω = (Ω_j^i)_(1≤I, j≤m)∈ L^2(R^n, R^m) If there exists a matrix valued function A,A^(-1)∈W^(1,2)(R^n)?L^∞(R^n), such that Ω = -A∇A^-, then the solution u∈W^(2,1)(B_(1/4)^n). In particular, the equations Δu =Ω∇u with u, θ∈W^(2,1)(B_1^n, R^m), Ω= (The equation is abbreviated), then the solution u ∈W^(2,1)(B_(1/4)^n).