OONS is a new Object Oriented Neural Simulator. The goal creating it is making the construction of neural model as quickly and easily as possible for the users, and can run in shorter time than other simulators. OONS is written in C++ programming language and using crank-Nicholson implicit integral method to allow for efficient simulations. Because of multi-level package, it is suitable both for beginners and for experts, especially the simulating algorithm researchers. We test OONS by Rallpacks benchmark set, the results show that OONS is higher efficient and more precision.