In this paper, on homogeneous groups, we study the Littlewood–Paley operators in variable exponent spaces. First, we prove that the weighted Littlewood–Paley operators are controlled by the weighted Hardy–Littlewood maximal function, and obtain the vector-valued inequalities of the Littlewood–Paley operators, including the Lusin function, Littlewood–Paley g function and gλ?function. Second, we prove the boundedness of multilinear Littlewood–Paley gψ?,λ function.