I have this 98 honda accord, it is a base model, which means it does not have an a/c, and I would like to know if there is a way I could add an a/c to my car. I think it could be done but not sure if I could use the same system used in the other accord models.

You would need to get way too involved to make this happen. You would need a compressor, condenser, evaporator, accumulator, all the hoses, electrical connectors and sensors, and then the knowledge of how to install it all... and the ability to do so. Part of it goes inside the dashboard, part goes on the engine, and the rest goes with the radiator.

Give up on this idea.