Standalone script

#!/usr/bin/perl

use strict;
use warnings;
use LWP::Simple::Post qw(post);

#binary file
open(FH, "binaryfile");
my $Data = do{local $/; <FH>};
close(FH);

my $url = 'http://localhost:8080/cgi-bin/index.pl';

my $content = post($url, $Data);

print $content;
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Server script

#!/usr/bin/perl

use strict;
use CGI;

my $q = new CGI;

print "\nMethod :", $ENV{REQUEST_METHOD};
print "\nContent_Length : ", $ENV{CONTENT_LENGTH};

#binary file
open (FH, ">binaryoutput");
print FH $q->param() if ($q->param());
close(FH);
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In the server script, i need to do several process and also i don't want to upload concept. For some concept, I want to post the data and retrive in the server look like parameters

Could this be another binmode issue? Try adding a binmode FH right after opening your file. You could also print out the length of $Data right before you post it to make sure it's the size you're expecting.