Abstract
Two basic conditions which should be usually satisfied in order to produce hyper chaos in the coupled logistic systems are proposed. Some cases in the coupled logistic systems are shown how route to hyper chaos by diagrams and numerical calculation. Methods of routes to hyper chaos in the coupled logistic systems are examined numerically. Bifurcation diagrams and Lyapunov exponents are then calculated to assert the existence of chaos and hyper chaos. Synchronization can be achieved in the coupled logistic systems.