I want to know the pump required gpm.

I have 10 story residential building.Floor height 10'-0".

Every floor has landing valve & every floor has hose boxes for each floor.

So how much GPM pump should i use and what is the method?what is the reference?

I have a calculation:

My building has one stand pipe(wet riser system).Say it need 500 GPM.I think if firing occurred in two floor then the pressure need 500x2=1000 gpm. Then the Siamese connection need another 500 gpm for fire bridget.

So,total 1500 gpm electric pump is required.Which head is 130'. also 20 gpm jockey pump is required.

is this method is correct? if yes in NFPA where i can find it.

Your method is wrong. See NFPA 101 or the local code to see what suppression systems are required (sprinklers, standpipe, etc.). Sprinkler demand should be calculated per NFPA 13 chapter 19. Standpipe demand should be calculated per NFPA 14 section 7.10. The pump must be selected based on the most demanding system, be it sprinklers, standpipe or other.

For Class I standpipes the demand is basically 500 GPM for the first standpipe plus 250 GPM for each additional standpipe in the building, up to 1000 GPM or 1250 GPM.