Question on How to see my mobile's contact numbers in PC I want to see my all contact numbers in my mobile on  my PC.
Your question is lacking multiple details – e.g. what device you're using, what Android version it is running, whether or not you use Google Services to backup/synchronize your data. Let me sum up some possibilities for a "generic answer":


If your contacts are synchronized with Google Services: Take your browser to Google Contacts (or to Gmail and switch to Contacts from there), so your contacts are displayed in your web browser. You even can edit them there.
Alternatively, open your Contacts app on your Android device, use Menu › Import/Export › Export to SD card to have all your contacts exported into a file using the VCard format. Transfer that file to your PC, and you can open it in almost all apps dealing with contacts (e.g. Outlook on Windows, or Evolution on Linux, or Thunderbird on any OS).
Alternatively, if your PC is running Windows, you can install MyPhoneExplorer to it (and the MyPhoneExplorer Client on your Android device). This not only allows you to see your contacts, but also to synchronize them (and your calendars) with your Windows PC, and much more.
Alternatively, use some remote management app which can be accessed via Web browser.