Sql server 2016 Change only server and without all databases How can i change server collation without changing whole databases, because i have 
many databases which aren't belong to me, so i want change server collation and my database only. 

SQL Server version:  2016
SQL Server Collation:  Arabic_CI_AI

in the server i have many databases, some of these databases i work on them and others are not belong to me and should not be touched. 
I want to change the collation: Arabic_100_CI_AI

When i use this script: 

sqlservr -m -T4022 -T3659 -s"MSSQLSERVER" -q"Arabic_CI_AI"


it change the server collation along with all databases in the server, but i don't want this i need to do change only the collation of the server only.

Is that possible?
You'll need to run setup with the REBUILDDATABASE option to change the server collation without changing the collation of existing user databases. This will create fresh system databases so you'll need to re-create server-level objects, re-attach user databases, and remap logins afterwards.

Note the tempdb collation will also be changed and can result in collation conflict errors after the operation depending on the existing user database collations and how queries are coded (e.g. creates temp tables without an explict DATABASE_DEFAULT column collation specified).

A system collation change is not a trivial matter and needs to be thoroughly tested.