一个比较典型的WMI查询

Get-WmiObject win32_bios -ComputerName server1, server2 | Format-Table `
  @{n='Hostname';e={$_.__server}},
  @{n='SerialTag';e={$_.SerialNumber}},
  @{n='OS';e={Get-WmiObject win32_operatingsystem -ComputerName $_.__server | select -ExpandProperty name}}