方法一：
systeminfo |find "x64"
方法二：
有时候需考虑wow的情况
IF PROCESSOR_ARCHITECTURE == amd64 or
PROCESSOR_ARCHITEW6432 == amd64 THEN
// OS is 64bit
ELSE
// OS is 32bit
END IF
Another way to test for the same thing is:
IF PROCESSOR_ARCHITECTURE == x86 AND
PROCESSOR_ARCHITEW6432 NOT DEFINED THEN
// OS is 32bit
ELSE
// OS is 64bit
END IF
var中存储的数据，PROCESSOR_ARCHITECTURE存储的内容
@echo off
for /f "tokens=1* delims=[" %%a in ('ver') do set b=%%b
set b=%b:* =%
goto %b:~0,4%%PROCESSOR_ARCHITECTURE:~-1%
:5.1.6
echo xp_32位
goto:eof
:6.1.6
echo win7_32位
goto:eof
:6.1.4
echo win7_64位
:6.0.6
echo vista_32
exit
:6.0.4
echo vista_64
exit