My right eyelid is more fatter than the left. How do I fix this this or what is this? (photos)

I definitely see the assymetry between your 2 eyelids, but need more information. Have you had surgery on your eyelids before? And in person exam would be better to figure out the reasoning for your eyelid assymetry. Often, especially with Asian eyes, you may have more ptosis (droopiness) in one compared to the other that makes one look "fatter" than the other. Whatever the reason, as long as we figure out the correct reason before or during surgery, making your eyes more symmetric is a fairly straightforward procedure. 

Uneven Asian eyelidsThe folds are uneven and you have medial  epicanthal folds.These can be fixed with minor eyelid surgery

I would recommend seeing an oculoplastic surgeon (eyelid specialist) for a full evaluation of why this asymmetry exists. They could recommend a possible treatment, or reassure you that nothing is necessary.