Is there acne scar surgery?

Nope: Surgery causes scarring. There are various dermatological treatments that can decrease the appearance of scars, but not remove them. See dermatologist or plastic surgeon.

Yes, for improvement: Scar excision, subcision, fillers/fat grafting, tca cross, dermabrasion, laser skin resurfacing, chemical peels are options for acne scars. These options have various ranges of improvement. For best results, it is better to get the skin surface relatively smooth before using the skin resurfacing procedures. If acne scars are depressed, skin resurfacing may improve the texture, but not the flatness.