You can convert a binary string to a number by using unpack. I took your string and came up with this. Note that I used "V", long little-endian. You may need to use something else, probably "N". 
#!/usr/bin/perl

use strict;
use warnings;
use diagnostics;

my $str = "01100110 01100101 01100101 
           01101100 01101001 01101110 
           01100111 00100000 01101100";

my $int  = unpack( "V", $str );
my $str1 = ord($int);
my $str2 = chr($str1);
binmode STDOUT, ':utf8';
print $int,  "\n";
print $str1, "\n";
print $str2, "\n";

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In reply to Re: what is difference between chr and oct? by Khen1950fx
in thread what is difference between chr and oct? by xiaoyafeng

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