After scanning the bluetooth where the scanning device data get store? if i set scan time is 5 minute how many devices detected. .....
I think you need to be a bit more specific in your question - for example, what data do you mean? which BLE module are you using? Which end of the BLE connections are you referring to? What are you actually trying to do?
There are datasheets available for the different modules (they interface in slightly different ways) and I would expect that there are one or more an AT commands you can use with the module to return scan and connection information.