Q: after i upgraded to OS X El Capitan, my mac is not working at all and have some messages appear. feels like there is no system at all. i have photos of the messages how can i upload it to see ?

At the top of the reply text box there is the menu bar. If you click on the Camera icon you then navigate to the images you want to post and then complete the reply normally.

This is the Mac Pro desktop forum. I requested your post be moved to the MacBook Pro laptop forum.

I can't read the text in the upper right (with correct orientation) of the first image.

What is the wording of the the second long line

I Cant read it either

it appears so fast then u go to a loop of entering the password and automatic restarf

i cant figure out what to do.

- Try resetting the SMC and NVRAM/PRAM

Intel-based Macs: Resetting the System Management Controller (SMC)

About NVRAM and PRAM

- Try starting in Safe Mode

OS X: What is Safe Boot, Safe Mode?

- Boot to Recovery and repair the startup disk

OS X: About OS X Recovery - Apple Support

- If it is repairable reinstall the OSX

How to reinstall OS X on your Mac - Apple Support

- If you do not have a backup use disk utility to restore the internal disk to an external disk so you can try to recover data.

Then format the startup disk and do a fresh install of OSX

Your MBP had a kernel panic. Examine this support article and see if any of the steps will help you.

https://support.apple.com/en-us/HT200553

Ciao.