We present a scalar perturbation for the Lambda CDM model, which breaks the isotropic symmetry of the universe. Based on the Union2 data, the least-chi(2) fit of the scalar perturbed Lambda CDM model shows that the universe has a preferred direction (l, b) = (287 degrees +/- 25 degrees, 11 degrees +/- 22 degrees). The magnitude of scalar perturbation is about -2.3 x 10(-5). The scalar perturbation for the Lambda CDM model implies a peculiar velocity, which is perpendicular to the radial direction. We show that the maximum peculiar velocities at red-shift z = 0.15 and z = 0.015 equal to 73 +/- 28 km s(-1) and 1099 +/- 427 km s(-1), respectively. They are compatible with the constraints on the peculiar velocity given by the Planck Collaboration.