Multi-scale interaction between LMC, the Galactic halo, and the disk is examined by N-body simulations. The Galactic models are constructed most realistically to satisfy available observational constraints. LMC is orbiting in a ellipse with pericentric radius of 50kpc, and the Galactic halo is assumed to be well beyond the orbit. By using hybrid algorithm I have succeeded to follow the evolution with million particles. The orbiting satellite excites density enhancement as a wake, and the wake exerts a tidal force on the disk. Through this multi-scale interaction, an integral warp is excited. Its amplitude is, however, a few 100pc, and impossible to explain the observed Galactic warp.