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We can use netstat to list all software ports,but how to list all hardware ports,is there such a tool?

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Under Linux:

cat /proc/ioports
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well, they are 'different' ports - tcp ports are more in terms of IO than actual ports (USB, PCI slots ect)

If you want hardware information you can use lshw or (i believe ) dmidecode. If you want to know what's going on in terms of I/O in general you can use iotop

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Does dmidecode show information about the port number of a device? – io2 May 6 '11 at 1:26
    
Not that kind of port. – Ignacio Vazquez-Abrams May 6 '11 at 1:27

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