My age is 23, but I am look like 30, how to change my appearance please help me, my weight is 85 and my body is also very strong

Is that 85 pounds? Or something else? How tall are you?

What makes you think you look older than you are?

85 kgs , and 176 is my height, I don't know what makes , but every one is saying like this.

Well, if you don't know what it is that's making you look older than you actually are, it's hard to give specific advice. Taking good care of your skin, always using moisturizer and protecting it from the skin should help. And maybe it's time for a new hairstyle? Or different makeup?