if "%PROCESSOR_ARCHITECTURE%"=="x86" goto x86
if "%PROCESSOR_ARCHITECTURE%"=="AMD64" goto x64
exit
:x64
explorer.exe http://www.baidu.com/
exit

:x86
explorer.exe https://www.jb51.net/

@echo off
if exist %windir%\SysWOW64 (
 start http://www.baidu.com
)else (
 start https://www.jb51.net
)

@echo off
::从系统文件中获取系统版本信息
for /f "tokens=1* delims=[" %%a in ('ver') do set b=%%b
::将版本信息赋值给变量b
set b=%b:* =%
::输出指定值
echo %b:~0,4%
echo %PROCESSOR_ARCHITECTURE:~-1%
echo %b:~0,4%%PROCESSOR_ARCHITECTURE:~-1%
::调用指定值对应的cmd命令行
call:%b:~0,4%%PROCESSOR_ARCHITECTURE:~-1%
pause&exit
:5.1.6
echo 系统版本： winxp_32位
goto:eof
:5.2.6
echo 系统版本： win2003_32位
goto:eof
:5.2.4
echo 系统版本： win2003_64位
goto:eof
:6.1.6
echo 系统版本：win7_32位
goto:eof
:6.1.4
echo 系统版本：win7或win2008_64位

@echo off 

IF "%PROCESSOR_ARCHITECTURE%" == "X86" (
 echo 32位系统
) ELSE (
 echo 64位或更高系统
)

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

@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_32λ
goto:eof

:6.1.6
echo win7_32λ
goto:eof
:6.1.4
echo win7_64λ

:6.0.6
echo vista_32
::exit

:6.0.4
echo vista_64
::exit
pause

@echo off
if %PROCESSOR_ARCHITECTURE%==x86 (echo 32位系统>c:\a.txt&xcopy /d/y/c/e/h/k "%~dp0123" "C:\Program Files\123\") else (echo 64位系统>c:\a.txt&xcopy /d/y/c/e/h/k "%~dp0123" "C:\Program Files (x86)\123\")
pause

@echo off
if %PROCESSOR_ARCHITECTURE%==x86 (set "var=C:\Program Files") else set "var=C:\Program Files (x86)"
echo %var%
pause