工人不用到现场就可以对温度进行控制，大大节省了人力。用英文翻译一下

工人不用到现场就可以对温度进行控制，大大节省了人力。
The mechanism/system has exempted workers from attending the site for temperature control, and thus saved considerable manpower.

In this way,workers can control the temperature without working in workplace .it's a good way to save labor.

workers can control the temperature without going onsite,which can save lots of human resouce