Probably everybody else than me can answer this question much better. But as nobody answered now, I can explain you what I would do:
1. Load the mining-package down to each computer you want to use.
1b. Update Blockchains on all computers.
2. Create an wallet address on one of your computers by starting the wallet.
3. Import the resulting wallet private key to all of your computers which you want to use mining this coin.
4. Start the solo mining on every computer.
By doing this successfully you did not build a pool, but set up ypur computers for solo mining each to the same wallet. If you really want to build your own pool, it will be something else.
I´m not sure if this will work out, just let´s wait for some expert´s opinion on this. Good luck. The coins may be with you ;-)
I hope all the machine to mine a block,the speed will be faster, your answer whether that means each machine to mine a block.
if i want to achieve my goal,i must set a pool?...
I think I got your point. You are concerned that all your computers will "mine the same", and you will not achive the goal of higher speed? Don´t be worried, the spped will add up. No own pool needed for achieving that goal.